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At the centre of the summit was a document that lists a number of core commitments - to use global leadership to prevent and end wars, to uphold the norms of humanitarian law, among others.

Trump caught many capitals and White House officials by surprise on 20 May, when he tweeted: “Now that our Country is ‘Transitioning back to Greatness,’ I am considering rescheduling the G-7, on the same or similar date, in Washington, DC, at the legendary Camp David. The other members are also beginning their COMEBACK. It would be a great sign to all – normalization!”

Had Abe attended the summit, he would have been required either to quarantine himself for two weeks or take a Covid-19 test on his return. Officials told Japanese media they did not want Abe to be seen to be getting privileged treatment, and cited the backlash the UK prime minister, Boris Johnson, has faced for clearing his senior adviser of breaking UK quarantine rules.

The UK is hosting a virtual coronavirus vaccine summit on 4 June intended to establish a global alliance and raise funds for research, and will hope the US decision to withdraw from the WHO does not dominate the event.

The Guardian has been significantly impacted by the pandemic. Like many other news organisations, we are facing an unprecedented collapse in advertising revenues. We rely to an ever greater extent on our readers, both for the moral force to continue doing journalism at a time like this and for the financial strength to facilitate that reporting.

diplomat with a 30-year career behind him, Ri Yong Ho is a former ambassador to the United Kingdom. Fluent in English, only last year Ri stood in front of the U.N. General Assembly and called Trump “President Evil” and “Commander-in-Grief.”

The liberal Moon swept into power after the divisive impeachment of his predecessor, and promised to pursue better relations with his northern neighbor. A human rights lawyer by trade, Moon was imprisoned as a student for his role in protesting against military strongman Park Chung-hee. Moon also served in South Korea’s special forces in the DMZ during a period of exceptionally high tensions. He promised to pursue a policy toward North Korea following in the pattern of the “Sunshine Policy” of his liberal predecessors. His challenge has been to persuade the Trump administration — and conservatives inside South Korea — of his dedication to the Seoul-Washington alliance.

South Korea’s top spy has been the architect of previous summits involving North Korea, and is viewed as an honest broker by Pyongyang. In the 1990s he lived in North Korea for two years, working on an international agreement that would have supplied the country with a non-military nuclear power reactor. Having studied at Johns Hopkins’ School of Advanced International Studies, Suh is also comfortable in Washington D.C., where he is well-known and respected.

Although he battled waves of PTSD after losing his leg, Jukes found solace and relief through being in nature. Rather than be deterred by his amputation, he started climbing even more, even taking up ice climbing

"The President's thinking was, there are a couple of countries that have handled the Covid crisis incredibly well, and it would be useful to have them participate in the G7 so we can learn some lessons there," he said. "Logistically to pull something like that off, I think it will take a little bit more time, so we're probably looking at the September time frame."

The countries had not been informed ahead of time that Trump would be announcing the possibility of holding a summit that would involve traveling even as restrictions and quarantine orders remained in place.

But questions about the size of the delegations, the logistics of travel, accommodations and security -- which is typically extremely tight at G7 summits -- were all still being weighed, according to the people familiar with the planning, along with pandemic precautions when the decision, announced Saturday, was made to delay until at least September.

Also unclear is how other G7 leaders will respond to the idea of inviting Russia, which Trump suggested Saturday, back into the group. Merkel in particular has been adamantly opposed when Trump raised the idea previously, including during a heated dinner meeting underneath the Biarritz lighthouse at last year's G7, CNN has previously reported.

The eerily humanlike chatbot, which went viral last year by generating its own answers to prompts, blindsided E.U. policymakers. The type of A.I. that powered ChatGPT was not mentioned in the draft law and was not a major focus of discussions about the policy. Lawmakers and their aides peppered one another with calls and texts to address the gap, as tech executives warned that overly aggressive regulations could put Europe at an economic disadvantage.

Even now, E.U. lawmakers are arguing over what to do, putting the law at risk. “We will always be lagging behind the speed of technology,” said Svenja Hahn, a member of the European Parliament who was involved in writing the A.I. law.

Lawmakers and regulators in Brussels, in Washington and elsewhere are losing a battle to regulate A.I. and are racing to catch up, as concerns grow that the powerful technology will automate away jobs, turbocharge the spread of disinformation and eventually develop its own kind of intelligence.

Nations have moved swiftly to tackle A.I.’s potential perils, but European officials have been caught off guard by the technology’s evolution, while U.S. lawmakers openly concede that they barely understand how it works.

The absence of rules has left a vacuum. Google, Meta, Microsoft and OpenAI, which makes ChatGPT, have been left to police themselves as they race to create and profit from advanced A.I. systems

At the root of the fragmented actions is a fundamental mismatch. A.I. systems are advancing so rapidly and unpredictably that lawmakers and regulators can’t keep pace

That gap has been compounded by an A.I. knowledge deficit in governments, labyrinthine bureaucracies and fears that too many rules may inadvertently limit the technology’s benefits.

Even in Europe, perhaps the world’s most aggressive tech regulator, A.I. has befuddled policymakers.

The European Union has plowed ahead with its new law, the A.I. Act, despite disputes over how to handle the makers of the latest A.I. systems.

The result has been a sprawl of responses. President Biden issued an executive order in October about A.I.’s national security effects as lawmakers debate what, if any, measures to pass. Japan is drafting nonbinding guidelines for the technology, while China has imposed restrictions on certain types of A.I. Britain has said existing laws are adequate for regulating the technology. Saudi Arabia and the United Arab Emirates are pouring government money into A.I. research.

A final agreement, expected as soon as Wednesday, could restrict certain risky uses of the technology and create transparency requirements about how the underlying systems work. But even if it passes, it is not expected to take effect for at least 18 months — a lifetime in A.I. development — and how it will be enforced is unclear.

Many companies, preferring nonbinding codes of conduct that provide latitude to speed up development, are lobbying to soften proposed regulations and pitting governments against one another.

“No one, not even the creators of these systems, know what they will be able to do,” said Matt Clifford, an adviser to Prime Minister Rishi Sunak of Britain, who presided over an A.I. Safety Summit last month with 28 countries. “The urgency comes from there being a real question of whether governments are equipped to deal with and mitigate the risks.”

Europe takes the lead

In mid-2018, 52 academics, computer scientists and lawyers met at the Crowne Plaza hotel in Brussels to discuss artificial intelligence. E.U. officials had selected them to provide advice about the technology, which was drawing attention for powering driverless cars and facial recognition systems.

as they discussed A.I.’s possible effects — including the threat of facial recognition technology to people’s privacy — they recognized “there were all these legal gaps, and what happens if people don’t follow those guidelines?”

In 2019, the group published a 52-page report with 33 recommendations, including more oversight of A.I. tools that could harm individuals and society.

By October, the governments of France, Germany and Italy, the three largest E.U. economies, had come out against strict regulation of general purpose A.I. models for fear of hindering their domestic tech start-ups. Others in the European Parliament said the law would be toothless without addressing the technology. Divisions over the use of facial recognition technology also persisted.

So when the A.I. Act was unveiled in 2021, it concentrated on “high risk” uses of the technology, including in law enforcement, school admissions and hiring. It largely avoided regulating the A.I. models that powered them unless listed as dangerous

“They sent me a draft, and I sent them back 20 pages of comments,” said Stuart Russell, a computer science professor at the University of California, Berkeley, who advised the European Commission. “Anything not on their list of high-risk applications would not count, and the list excluded ChatGPT and most A.I. systems.”

E.U. leaders were undeterred.“Europe may not have been the leader in the last wave of digitalization, but it has it all to lead the next one,” Ms. Vestager said when she introduced the policy at a news conference in Brussels.

In 2020, European policymakers decided that the best approach was to focus on how A.I. was used and not the underlying technology. A.I. was not inherently good or bad, they said — it depended on how it was applied.

Nineteen months later, ChatGPT arrived.

The Washington game

Lacking tech expertise, lawmakers are increasingly relying on Anthropic, Microsoft, OpenAI, Google and other A.I. makers to explain how it works and to help create rules.

“We’re not experts,” said Representative Ted Lieu, Democrat of California, who hosted Sam Altman, OpenAI’s chief executive, and more than 50 lawmakers at a dinner in Washington in May. “It’s important to be humble.”

Tech companies have seized their advantage. In the first half of the year, many of Microsoft’s and Google’s combined 169 lobbyists met with lawmakers and the White House to discuss A.I. legislation, according to lobbying disclosures. OpenAI registered its first three lobbyists and a tech lobbying group unveiled a $25 million campaign to promote A.I.’s benefits this year.

In that same period, Mr. Altman met with more than 100 members of Congress, including former Speaker Kevin McCarthy, Republican of California, and the Senate leader, Chuck Schumer, Democrat of New York. After testifying in Congress in May, Mr. Altman embarked on a 17-city global tour, meeting world leaders including President Emmanuel Macron of France, Mr. Sunak and Prime Minister Narendra Modi of India.

, the White House announced that the four companies had agreed to voluntary commitments on A.I. safety, including testing their systems through third-party overseers — which most of the companies were already doing.

“It was brilliant,” Mr. Smith said. “Instead of people in government coming up with ideas that might have been impractical, they said, ‘Show us what you think you can do and we’ll push you to do more.’”

In a statement, Ms. Raimondo said the federal government would keep working with companies so “America continues to lead the world in responsible A.I. innovation.”

Over the summer, the Federal Trade Commission opened an investigation into OpenAI and how it handles user data. Lawmakers continued welcoming tech executives.

In September, Mr. Schumer was the host of Elon Musk, Mark Zuckerberg of Meta, Sundar Pichai of Google, Satya Nadella of Microsoft and Mr. Altman at a closed-door meeting with lawmakers in Washington to discuss A.I. rules. Mr. Musk warned of A.I.’s “civilizational” risks, while Mr. Altman proclaimed that A.I. could solve global problems such as poverty.

A.I. companies are playing governments off one another. In Europe, industry groups have warned that regulations could put the European Union behind the United States. In Washington, tech companies have cautioned that China might pull ahead.

In May, Ms. Vestager, Ms. Raimondo and Antony J. Blinken, the U.S. secretary of state, met in Lulea, Sweden, to discuss cooperating on digital policy.

“China is way better at this stuff than you imagine,” Mr. Clark of Anthropic told members of Congress in January.

After two days of talks, Ms. Vestager announced that Europe and the United States would release a shared code of conduct for safeguarding A.I. “within weeks.” She messaged colleagues in Brussels asking them to share her social media post about the pact, which she called a “huge step in a race we can’t afford to lose.”

Months later, no shared code of conduct had appeared. The United States instead announced A.I. guidelines of its own.

Little progress has been made internationally on A.I. With countries mired in economic competition and geopolitical distrust, many are setting their own rules for the borderless technology.

Yet “weak regulation in another country will affect you,” said Rajeev Chandrasekhar, India’s technology minister, noting that a lack of rules around American social media companies led to a wave of global disinformation.

“Most of the countries impacted by those technologies were never at the table when policies were set,” he said. “A.I will be several factors more difficult to manage.”

Even among allies, the issue has been divisive. At the meeting in Sweden between E.U. and U.S. officials, Mr. Blinken criticized Europe for moving forward with A.I. regulations that could harm American companies, one attendee said. Thierry Breton, a European commissioner, shot back that the United States could not dictate European policy, the person said.

Some policymakers said they hoped for progress at an A.I. safety summit that Britain held last month at Bletchley Park, where the mathematician Alan Turing helped crack the Enigma code used by the Nazis. The gathering featured Vice President Kamala Harris; Wu Zhaohui, China’s vice minister of science and technology; Mr. Musk; and others.

The upshot was a 12-paragraph statement describing A.I.’s “transformative” potential and “catastrophic” risk of misuse. Attendees agreed to meet again next year.

The talks, in the end, produced a deal to keep talking.

Investment firm Schroders said there could be $23tn of global economic losses a year in the long term without rapid action. This permanent economic damage would be almost four times the scale of the impact of the 2008 global financial crisis

Lord Nicholas Stern, of the London School of Economics said: “The low-carbon economy is the growth story of the 21st century and it is inclusive growth. Without that story, we would not have got the 2015 Paris agreement, but the story has grown stronger and stronger and is really compelling now.”

A key demand of the Global Investor Statement is to phase out coal-fired power stations across the world

The French president Emmanuel Macron’s botched attempt to increase fuel taxes and the gilets jaunes protests that followed were a model of how not to do it, said observers in Poland.

the UN summit has seen US, Chinese and Japanese financial institutions cited as leaders in providing nearly $500bn in backing for new coal plants since the Paris agreement was signed.

Dozens of nations will affirm their commitment to end their coal burning on Thursday

“It failed to take people along with them, accompanying the policy with social measures to allow citizens to embrace the opportunities of the transition and ride out the challenges,

They also want an end to subsidies for coal, oil and gas, which the IMF rates at $5tn a year and which the G20 has been promising to tackle for a decade. This measure alone could cut global CO2 emissions by 10% by 2030, according a UN report released in time for the Poland summit.

The investors said current national pledges to cut carbon would lead to a catastrophic 3C of global warming and that plans must be dramatically increased by 2020

This has made foreign policy unprecedentedly politicised: how Americans feel about it is almost entirely determined by how they feel about the president. How they feel about Russia illustrates this especially starkly—because the implications of thinking that Mr Trump is wrong and Mr Clapper right, as many Democrats do, is that the president may be illegitimate.

Other reasons for Trump supporters’ willing suspension of disbelief on Russia’s malign intent are unique to Republicans. The most important is the fervour of their support for Mr Trump’s blood-and-soil nativist policies. This is the main explanation for his hold on the right and the reason he can flip opinion on arcane foreign or economic policies so easily. American politics will remain fiercely antagonistic, polarising the country on foreign and domestic policy, so long as it is defined in such visceral terms.

The Russian campaign was based on a simple appreciation of that fact. Many of its propaganda tools merely aped the sorts of chauvinist and ethno-nationalist sentiment that Mr Trump and other right-wing politicians have long used to charge up their base

Another reason Republicans might choose to deny the existence of such propaganda is because to do otherwise would be to admit that they have been had, and not only by Moscow.

relations with Russia have become a mirror to America’s big weakness, the political threat from within. That is why Mr Putin has been able to sow such chaos so cheaply; why he is getting away with it so easily; and why his meddling will surely continue

there is a good chance that Kim Jong Un will do what is right for his people and for humanity. Look forward to our meeting!

by his lack of direct contact with foreign leaders, and his apparent unwillingness to stray too far from Pyongyang. Compared with his father, Kim Jong Il, the current dictator had little lead time before taking the reins.

“Previous Chinese negotiating behavior suggests that a meeting with Xi carries real weight

Mr. Kim and his wife met Mr. Xi and his wife during a lunch that “was overflowing with a harmonious and intimate atmosphere from its beginning to the end,”

which North Korean state media said was accepted “with pleasure”—though Chinese state media didn’t mention the invitation, one of several differences that hinted at enduring tensions between the neighbors.

Mr. Kim’s willingness to bring his wife to dinners with the South Korean envoys and with the Chinese president helps to make him “look like a fuller leader—a three-dimensional person, not this caricature,” she said.

The visit also allowed Beijing, with whom relations had soured, to play a central role in efforts to find a solution to the nuclear standoff.

In talks with the U.S., security analysts expect Mr. Kim to seek recognition as a nuclear-weapons state, or to demand sanctions relief and U.S. security guarantees in return for giving up its nuclear arms.

North Korean leaders’ preferred means of travel—armored train—would appear to reduce the likelihood of a summit in Scandinavia or Switzerland, given the distance and security concerns. Mr. Kim’s trip, like that of his father, w

But in venturing beyond his borders for the first time since taking power, Mr. Kim has signaled he can rub shoulders with world leaders like Mr. Xi.

Kim is sending a signal that he has options outside of full capitulation to Trump.”

Such meetings between leaders of powerful nations are serious business with real consequences for millions. There’s a reason why they are normally held only after months or even years of tough, detailed negotiations. The president ordinarily arrives as the closer. But there will be little time for any such preparation before a Trump-Kim summit, now tentatively booked for May. And, as Scott Snyder of the Council of Foreign Relations told me, “Trump had already put all of his cards on the table for everyone to see.”

One thing is certain. Whatever the outcome, Trump will proclaim not just victory, but a huge, historic one. I just hope it’s one that we, and South Korea, can live with.

“One said, ‘In college you have to teach yourself more than half the content on your own,’” Ms. Toll said. That is very different from what is required in high school, she said, “and that sort of led to the whole concept of self-directed learning.”

For much of the day, each classroom is split in two, with one teacher working more traditionally with half of the students while a second teacher supervises students wearing noise-cancelling headphones and working on their own on laptops.

Mr. Cuban said he was particularly impressed with the way that Summit schools asked students to set goals for themselves.

But he added that he thought the impact of online teaching tools depended on how they were implemented and that the ultimate test, for both Summit and for Achievement First, would be what happens to college graduation rates.

the team came to believe that Achievement First students were not sufficiently engaged in school. The expeditions, also borrowed from Summit, are intended to spark passions and inspire long-term ambitions.

Achievement First’s Greenfield model also emphasizes setting goals. Twice a week students meet with a teacher, referred to as a “goal coach,” to go over their progress in different areas and set goals for the week.

Twice a week, students participate in what the network calls “circles” — a structure borrowed from the social-emotional curriculum of another charter network, Valor Collegiate Academies, in Nashville.

Mr. Samouha said that one of the surprising discoveries in his team’s interviews with alumni who had dropped out of college was that, in some cases, their parents had actually encouraged them to drop out, because they didn’t like seeing them struggle and didn’t know that such difficulties were normal and surmountable. He said the Greenfield team traced that back to the network having not made the parents full partners in their children’s schooling.

So in the Greenfield model, parent-teacher conferences are student-led, and attended by the members of a student’s “dream team,” which includes parents or other caregivers, as well as other mentors, like older siblings, pastors, coaches or family friends.

“We’re not going to solve this through a weekly parent seminar on challenges your child will face in college,” Mr. Samouha said. “We’re going to solve it by literally building an experience where parents are at the table with teachers and students.”

The network’s ultimate goal is to raise its college completion rate to 75 percent, and it says among its more recent classes about half of graduates are on track to finish college.

“We thought they were out of their minds. We told them it would be an absolutely devastating approach to deal with the pandemic,” one US official told the authors

Johnson and the French president, Emmanuel Macron, backed Trump’s call for an in-person G7 summit at Camp David in the summer, which the US president saw as a way to show leadership and demonstrate that things were getting back to normal.

But the plan was torpedoed by Angela Merkel’s decision not to attend. According to Aftershocks, the refusal was only partly motivated by the German chancellor’s concern about the health risks of an in-person summit. She also thought her mere presence would be counterproductive to reaching agreement because of Trump’s viscerally hostile reaction to her.

Merkel told Trump of her decision not to come Camp David on 28 May and he reacted furiously, yelling and then hanging up on her. The president then announced the summit would be canceled and called into question the G7’s relevance, using the occasion to repeat his earlier calls for Russia to be readmitted.

“​​With the Europeans now fully estranged from the United States, for all practical purposes the G7 ceased to exist,” Wright and Kahl argue. “As Covid-19 swept through every part of the world in 2020, it would be every nation for itself.”

Kamala Harris, the US vice-president, said the existential risks posed by AI systems were profound, but the near-term risks, such as misinformation and bias, demanded regulators’ attention.

The US and China are among 28 nations who pledged to work together to combat the “catastrophic harm” potentially posed by powerful AI systems in the so-called Bletchley Declaration.

The prime minister said: “I believe there will be nothing more transformative to the futures of our children and grandchildren than technological advances like AI. We owe it to them to ensure AI develops in a safe and responsible way, gripping the risks it poses early enough in the process.”

Matt Clifford, the prime minister’s representative at the summit, denied the US was trying to steal Sunak’s thunder on AI regulation. “The US has been our closest partner on this,”

Who is leading the world on AI safety regulation? Britain, the US or the EU? It is no mean feat for Rishi Sunak’s government to have convened this safety summit and have the US and China sign an agreement on a forward direction with 26 other nations

But in regulation what really matters? For the AI companies it is executive orders like the one issued by the Biden administration this week and the forthcoming AI Act in the European Union that will force them to act, not communiqués like the Bletchley Declaration.

Obama’s resistance to direct intervention only grew. After several months of deliberation, he authorized the CIA to train and fund Syrian rebels, but he also shared the outlook of his former defense secretary, Robert Gates, who had routinely asked in meetings, “Shouldn’t we finish up the two wars we have before we look for another?”

In his first term, he came to believe that only a handful of threats in the Middle East conceivably warranted direct U.S. military intervention. These included the threat posed by al‑Qaeda; threats to the continued existence of Israel (“It would be a moral failing for me as president of the United States” not to defend Israel, he once told me); and, not unrelated to Israel’s security, the threat posed by a nuclear-armed Iran.

Bush and Scowcroft removed Saddam Hussein’s army from Kuwait in 1991, and they deftly managed the disintegration of the Soviet Union; Scowcroft also, on Bush’s behalf, toasted the leaders of China shortly after the slaughter in Tiananmen Square.

As Obama was writing his campaign manifesto, The Audacity of Hope, in 2006, Susan Rice, then an informal adviser, felt it necessary to remind him to include at least one line of praise for the foreign policy of President Bill Clinton, to partially balance the praise he showered on Bush and Scowcroft.

“When you have a professional army,” he once told me, “that is well armed and sponsored by two large states”—Iran and Russia—“who have huge stakes in this, and they are fighting against a farmer, a carpenter, an engineer who started out as protesters and suddenly now see themselves in the midst of a civil conflict …” He paused. “The notion that we could have—in a clean way that didn’t commit U.S. military forces—changed the equation on the ground there was never true.”

The message Obama telegraphed in speeches and interviews was clear: He would not end up like the second President Bush—a president who became tragically overextended in the Middle East, whose decisions filled the wards of Walter Reed with grievously wounded soldiers, who was helpless to stop the obliteration of his reputation, even when he recalibrated his policies in his second term. Obama would say privately that the first task of an American president in the post-Bush international arena was “Don’t do stupid shit.”

Hillary Clinton, when she was Obama’s secretary of state, argued for an early and assertive response to Assad’s violence. In 2014, after she left office, Clinton told me that “the failure to help build up a credible fighting force of the people who were the originators of the protests against Assad … left a big vacuum, which the jihadists have now filled.” When The Atlantic published this statement, and also published Clinton’s assessment that “great nations need organizing principles, and ‘Don’t do stupid stuff’ is not an organizing principle,” Obama became “rip-shit angry,” according to one of his senior advisers. The president did not understand how “Don’t do stupid shit” could be considered a controversial slogan.

The Iraq invasion, Obama believed, should have taught Democratic interventionists like Clinton, who had voted for its authorization, the dangers of doing stupid shit. (Clinton quickly apologized to Obama for her comments,

Obama, unlike liberal interventionists, is an admirer of the foreign-policy realism of President George H. W. Bush and, in particular, of Bush’s national-security adviser, Brent Scowcroft (“I love that guy,” Obama once told me).

The danger to the United States posed by the Assad regime did not rise to the level of these challenges.

Obama generally believes that the Washington foreign-policy establishment, which he secretly disdains, makes a fetish of “credibility”—particularly the sort of credibility purchased with force. The preservation of credibility, he says, led to Vietnam. Within the White House, Obama would argue that “dropping bombs on someone to prove that you’re willing to drop bombs on someone is just about the worst reason to use force.”

American national-security credibility, as it is conventionally understood in the Pentagon, the State Department, and the cluster of think tanks headquartered within walking distance of the White House, is an intangible yet potent force—one that, when properly nurtured, keeps America’s friends feeling secure and keeps the international order stable.

All week, White House officials had publicly built the case that Assad had committed a crime against humanity. Kerry’s speech would mark the culmination of this campaign.

But the president had grown queasy. In the days after the gassing of Ghouta, Obama would later tell me, he found himself recoiling from the idea of an attack unsanctioned by international law or by Congress. The American people seemed unenthusiastic about a Syria intervention; so too did one of the few foreign leaders Obama respects, Angela Merkel, the German chancellor. She told him that her country would not participate in a Syria campaign. And in a stunning development, on Thursday, August 29, the British Parliament denied David Cameron its blessing for an attack. John Kerry later told me that when he heard that, “internally, I went, Oops.”

Obama was also unsettled by a surprise visit early in the week from James Clapper, his director of national intelligence, who interrupted the President’s Daily Brief, the threat report Obama receives each morning from Clapper’s analysts, to make clear that the intelligence on Syria’s use of sarin gas, while robust, was not a “slam dunk.” He chose the term carefully. Clapper, the chief of an intelligence community traumatized by its failures in the run-up to the Iraq War, was not going to overpromise, in the manner of the onetime CIA director George Tenet, who famously guaranteed George W. Bush a “slam dunk” in Iraq.

While the Pentagon and the White House’s national-security apparatuses were still moving toward war (John Kerry told me he was expecting a strike the day after his speech), the president had come to believe that he was walking into a trap—one laid both by allies and by adversaries, and by conventional expectations of what an American president is supposed to do.

Late on Friday afternoon, Obama determined that he was simply not prepared to authorize a strike. He asked McDonough, his chief of staff, to take a walk with him on the South Lawn of the White House. Obama did not choose McDonough randomly: He is the Obama aide most averse to U.S. military intervention, and someone who, in the words of one of his colleagues, “thinks in terms of traps.” Obama, ordinarily a preternaturally confident man, was looking for validation, and trying to devise ways to explain his change of heart, both to his own aides and to the public

The third, and most important, factor, he told me, was “our assessment that while we could inflict some damage on Assad, we could not, through a missile strike, eliminate the chemical weapons themselves, and what I would then face was the prospect of Assad having survived the strike and claiming he had successfully defied the United States, that the United States had acted unlawfully in the absence of a UN mandate, and that that would have potentially strengthened his hand rather than weakened it.

Others had difficulty fathoming how the president could reverse himself the day before a planned strike. Obama, however, was completely calm. “If you’ve been around him, you know when he’s ambivalent about something, when it’s a 51–49 decision,” Ben Rhodes told me. “But he was completely at ease.”

Obama also shared with McDonough a long-standing resentment: He was tired of watching Washington unthinkingly drift toward war in Muslim countries. Four years earlier, the president believed, the Pentagon had “jammed” him on a troop surge for Afghanistan. Now, on Syria, he was beginning to feel jammed again.

The fourth factor, he said, was of deeper philosophical importance. “This falls in the category of something that I had been brooding on for some time,” he said. “I had come into office with the strong belief that the scope of executive power in national-security issues is very broad, but not limitless.”

Obama’s decision caused tremors across Washington as well. John McCain and Lindsey Graham, the two leading Republican hawks in the Senate, had met with Obama in the White House earlier in the week and had been promised an attack. They were angered by the about-face. Damage was done even inside the administration. Neither Chuck Hagel, then the secretary of defense, nor John Kerry was in the Oval Office when the president informed his team of his thinking. Kerry would not learn about the change until later that evening. “I just got fucked over,” he told a friend shortly after talking to the president that night. (When I asked Kerry recently about that tumultuous night, he said, “I didn’t stop to analyze it. I figured the president had a reason to make a decision and, honestly, I understood his notion.”)

The president asked Congress to authorize the use of force—the irrepressible Kerry served as chief lobbyist—and it quickly became apparent in the White House that Congress had little interest in a strike. When I spoke with Biden recently about the red-line decision, he made special note of this fact. “It matters to have Congress with you, in terms of your ability to sustain what you set out to do,” he said. Obama “didn’t go to Congress to get himself off the hook. He had his doubts at that point, but he knew that if he was going to do anything, he better damn well have the public with him, or it would be a very short ride.” Congress’s clear ambivalence convinced Biden that Obama was correct to fear the slippery slope. “What happens when we get a plane shot down? Do we not go in and rescue?,” Biden asked. “You need the support of the American people.”

At the G20 summit in St. Petersburg, which was held the week after the Syria reversal, Obama pulled Putin aside, he recalled to me, and told the Russian president “that if he forced Assad to get rid of the chemical weapons, that that would eliminate the need for us taking a military strike.” Within weeks, Kerry, working with his Russian counterpart, Sergey Lavrov, would engineer the removal of most of Syria’s chemical-weapons arsenal—a program whose existence Assad until then had refused to even acknowledge.

The arrangement won the president praise from, of all people, Benjamin Netanyahu, the Israeli prime minister, with whom he has had a consistently contentious relationship. The removal of Syria’s chemical-weapons stockpiles represented “the one ray of light in a very dark region,” Netanyahu told me not long after the deal was announced.

John Kerry today expresses no patience for those who argue, as he himself once did, that Obama should have bombed Assad-regime sites in order to buttress America’s deterrent capability. “You’d still have the weapons there, and you’d probably be fighting isil” for control of the weapons, he said, referring to the Islamic State, the terror group also known as isis. “It just doesn’t make sense. But I can’t deny to you that this notion about the red line being crossed and [Obama’s] not doing anything gained a life of its own.”

today that decision is a source of deep satisfaction for him.

“I’m very proud of this moment,” he told me. “The overwhelming weight of conventional wisdom and the machinery of our national-security apparatus had gone fairly far. The perception was that my credibility was at stake, that America’s credibility was at stake. And so for me to press the pause button at that moment, I knew, would cost me politically. And the fact that I was able to pull back from the immediate pressures and think through in my own mind what was in America’s interest, not only with respect to Syria but also with respect to our democracy, was as tough a decision as I’ve made—and I believe ultimately it was the right decision to make.”

By 2013, Obama’s resentments were well developed. He resented military leaders who believed they could fix any problem if the commander in chief would simply give them what they wanted, and he resented the foreign-policy think-tank complex. A widely held sentiment inside the White House is that many of the most prominent foreign-policy think tanks in Washington are doing the bidding of their Arab and pro-Israel funders. I’ve heard one administration official refer to Massachusetts Avenue, the home of many of these think tanks, as “Arab-occupied territory.”

over the past few months, I’ve spent several hours talking with him about the broadest themes of his “long game” foreign policy, including the themes he is most eager to discuss—namely, the ones that have nothing to do with the Middle East.

I have come to believe that, in Obama’s mind, August 30, 2013, was his liberation day, the day he defied not only the foreign-policy establishment and its cruise-missile playbook, but also the demands of America’s frustrating, high-maintenance allies in the Middle East—countries, he complains privately to friends and advisers, that seek to exploit American “muscle” for their own narrow and sectarian ends.

“Where am I controversial? When it comes to the use of military power,” he said. “That is the source of the controversy. There’s a playbook in Washington that presidents are supposed to follow. It’s a playbook that comes out of the foreign-policy establishment. And the playbook prescribes responses to different events, and these responses tend to be militarized responses. Where America is directly threatened, the playbook works. But the playbook can also be a trap that can lead to bad decisions. In the midst of an international challenge like Syria, you get judged harshly if you don’t follow the playbook, even if there are good reasons why it does not apply.”

For some foreign-policy experts, even within his own administration, Obama’s about-face on enforcing the red line was a dispiriting moment in which he displayed irresolution and naïveté, and did lasting damage to America’s standing in the world. “Once the commander in chief draws that red line,” Leon Panetta, who served as CIA director and then as secretary of defense in Obama’s first term, told me recently, “then I think the credibility of the commander in chief and this nation is at stake if he doesn’t enforce it.” Right after Obama’s reversal, Hillary Clinton said privately, “If you say you’re going to strike, you have to strike. There’s no choice.”

Obama’s defenders, however, argue that he did no damage to U.S. credibility, citing Assad’s subsequent agreement to have his chemical weapons removed. “The threat of force was credible enough for them to give up their chemical weapons,” Tim Kaine, a Democratic senator from Virginia, told me. “We threatened military action and they responded. That’s deterrent credibility.”

History may record August 30, 2013, as the day Obama prevented the U.S. from entering yet another disastrous Muslim civil war, and the day he removed the threat of a chemical attack on Israel, Turkey, or Jordan. Or it could be remembered as the day he let the Middle East slip from America’s grasp, into the hands of Russia, Iran, and isis

spoke with obama about foreign policy when he was a U.S. senator, in 2006. At the time, I was familiar mainly with the text of a speech he had delivered four years earlier, at a Chicago antiwar rally. It was an unusual speech for an antiwar rally in that it was not antiwar; Obama, who was then an Illinois state senator, argued only against one specific and, at the time, still theoretical, war. “I suffer no illusions about Saddam Hussein,” he said. “He is a brutal man. A ruthless man … But I also know that Saddam poses no imminent and direct threat to the United States or to his neighbors.” He added, “I know that an invasion of Iraq without a clear rationale and without strong international support will only fan the flames of the Middle East, and encourage the worst, rather than best, impulses of the Arab world, and strengthen the recruitment arm of al-Qaeda.”

This speech had made me curious about its author. I wanted to learn how an Illinois state senator, a part-time law professor who spent his days traveling between Chicago and Springfield, had come to a more prescient understanding of the coming quagmire than the most experienced foreign-policy thinkers of his party, including such figures as Hillary Clinton, Joe Biden, and John Kerry, not to mention, of course, most Republicans and many foreign-policy analysts and writers, including me.

This was the moment the president believes he finally broke with what he calls, derisively, the “Washington playbook.”

“isis is not an existential threat to the United States,” he told me in one of these conversations. “Climate change is a potential existential threat to the entire world if we don’t do something about it.” Obama explained that climate change worries him in particular because “it is a political problem perfectly designed to repel government intervention. It involves every single country, and it is a comparatively slow-moving emergency, so there is always something seemingly more urgent on the agenda.”

At the moment, of course, the most urgent of the “seemingly more urgent” issues is Syria. But at any given moment, Obama’s entire presidency could be upended by North Korean aggression, or an assault by Russia on a member of nato, or an isis-planned attack on U.S. soil. Few presidents have faced such diverse tests on the international stage as Obama has, and the challenge for him, as for all presidents, has been to distinguish the merely urgent from the truly important, and to focus on the important.

My goal in our recent conversations was to see the world through Obama’s eyes, and to understand what he believes America’s role in the world should be. This article is informed by our recent series of conversations, which took place in the Oval Office; over lunch in his dining room; aboard Air Force One; and in Kuala Lumpur during his most recent visit to Asia, in November. It is also informed by my previous interviews with him and by his speeches and prolific public ruminations, as well as by conversations with his top foreign-policy and national-security advisers, foreign leaders and their ambassadors in Washington, friends of the president and others who have spoken with him about his policies and decisions, and his adversaries and critics.

Over the course of our conversations, I came to see Obama as a president who has grown steadily more fatalistic about the constraints on America’s ability to direct global events, even as he has, late in his presidency, accumulated a set of potentially historic foreign-policy achievements—controversial, provisional achievements, to be sure, but achievements nonetheless: the opening to Cuba, the Paris climate-change accord, the Trans-Pacific Partnership trade agreement, and, of course, the Iran nuclear deal.

These he accomplished despite his growing sense that larger forces—the riptide of tribal feeling in a world that should have already shed its atavism; the resilience of small men who rule large countries in ways contrary to their own best interests; the persistence of fear as a governing human emotion—frequently conspire against the best of America’s intentions. But he also has come to learn, he told me, that very little is accomplished in international affairs without U.S. leadership.

Obama talked me through this apparent contradiction. “I want a president who has the sense that you can’t fix everything,” he said. But on the other hand, “if we don’t set the agenda, it doesn’t happen.” He explained what he meant. “The fact is, there is not a summit I’ve attended since I’ve been president where we are not setting the agenda, where we are not responsible for the key results,” he said. “That’s true whether you’re talking about nuclear security, whether you’re talking about saving the world financial system, whether you’re talking about climate.”

One day, over lunch in the Oval Office dining room, I asked the president how he thought his foreign policy might be understood by historians. He started by describing for me a four-box grid representing the main schools of American foreign-policy thought. One box he called isolationism, which he dismissed out of hand. “The world is ever-shrinking,” he said. “Withdrawal is untenable.” The other boxes he labeled realism, liberal interventionism, and internationalism. “I suppose you could call me a realist in believing we can’t, at any given moment, relieve all the world’s misery,” he said. “We have to choose where we can make a real impact.” He also noted that he was quite obviously an internationalist, devoted as he is to strengthening multilateral organizations and international norms.

If a crisis, or a humanitarian catastrophe, does not meet his stringent standard for what constitutes a direct national-security threat, Obama said, he doesn’t believe that he should be forced into silence. He is not so much the realist, he suggested, that he won’t pass judgment on other leaders.

Though he has so far ruled out the use of direct American power to depose Assad, he was not wrong, he argued, to call on Assad to go. “Oftentimes when you get critics of our Syria policy, one of the things that they’ll point out is ‘You called for Assad to go, but you didn’t force him to go. You did not invade.’ And the notion is that if you weren’t going to overthrow the regime, you shouldn’t have said anything. That’s a weird argument to me, the notion that if we use our moral authority to say ‘This is a brutal regime, and this is not how a leader should treat his people,’ once you do that, you are obliged to invade the country and install a government you prefer.”

“I am very much the internationalist,” Obama said in a later conversation. “And I am also an idealist insofar as I believe that we should be promoting values, like democracy and human rights and norms and values

“Having said that,” he continued, “I also believe that the world is a tough, complicated, messy, mean place, and full of hardship and tragedy. And in order to advance both our security interests and those ideals and values that we care about, we’ve got to be hardheaded at the same time as we’re bighearted, and pick and choose our spots, and recognize that there are going to be times where the best that we can do is to shine a spotlight on something that’s terrible, but not believe that we can automatically solve it. There are going to be times where our security interests conflict with our concerns about human rights. There are going to be times where we can do something about innocent people being killed, but there are going to be times where we can’t.”

If Obama ever questioned whether America really is the world’s one indispensable nation, he no longer does so. But he is the rare president who seems at times to resent indispensability, rather than embrace it.

“Free riders aggravate me,” he told me. Recently, Obama warned that Great Britain would no longer be able to claim a “special relationship” with the United States if it did not commit to spending at least 2 percent of its GDP on defense. “You have to pay your fair share,” Obama told David Cameron, who subsequently met the 2 percent threshold.

Part of his mission as president, Obama explained, is to spur other countries to take action for themselves, rather than wait for the U.S. to lead. The defense of the liberal international order against jihadist terror, Russian adventurism, and Chinese bullying depends in part, he believes, on the willingness of other nations to share the burden with the U.S

This is why the controversy surrounding the assertion—made by an anonymous administration official to The New Yorker during the Libya crisis of 2011—that his policy consisted of “leading from behind” perturbed him. “We don’t have to always be the ones who are up front,” he told me. “Sometimes we’re going to get what we want precisely because we are sharing in the agenda.

The president also seems to believe that sharing leadership with other countries is a way to check America’s more unruly impulses. “One of the reasons I am so focused on taking action multilaterally where our direct interests are not at stake is that multilateralism regulates hubris,”

He consistently invokes what he understands to be America’s past failures overseas as a means of checking American self-righteousness. “We have history,” he said. “We have history in Iran, we have history in Indonesia and Central America. So we have to be mindful of our history when we start talking about intervening, and understand the source of other people’s suspicions.”

In his efforts to off-load some of America’s foreign-policy responsibilities to its allies, Obama appears to be a classic retrenchment president in the manner of Dwight D. Eisenhower and Richard Nixon. Retrenchment, in this context, is defined as “pulling back, spending less, cutting risk, and shifting burdens to allies

One difference between Eisenhower and Nixon, on the one hand, and Obama, on the other, Sestanovich said, is that Obama “appears to have had a personal, ideological commitment to the idea that foreign policy had consumed too much of the nation’s attention and resources.”

But once he decides that a particular challenge represents a direct national-security threat, he has shown a willingness to act unilaterally. This is one of the larger ironies of the Obama presidency: He has relentlessly questioned the efficacy of force, but he has also become the most successful terrorist-hunter in the history of the presidency, one who will hand to his successor a set of tools an accomplished assassin would envy

“He applies different standards to direct threats to the U.S.,” Ben Rhodes says. “For instance, despite his misgivings about Syria, he has not had a second thought about drones.” Some critics argue he should have had a few second thoughts about what they see as the overuse of drones. But John Brennan, Obama’s CIA director, told me recently that he and the president “have similar views. One of them is that sometimes you have to take a life to save even more lives. We have a similar view of just-war theory. The president requires near-certainty of no collateral damage. But if he believes it is necessary to act, he doesn’t hesitate.”

Those who speak with Obama about jihadist thought say that he possesses a no-illusions understanding of the forces that drive apocalyptic violence among radical Muslims, but he has been careful about articulating that publicly, out of concern that he will exacerbate anti-Muslim xenophobia

He has a tragic realist’s understanding of sin, cowardice, and corruption, and a Hobbesian appreciation of how fear shapes human behavior. And yet he consistently, and with apparent sincerity, professes optimism that the world is bending toward justice. He is, in a way, a Hobbesian optimist.

The contradictions do not end there. Though he has a reputation for prudence, he has also been eager to question some of the long-standing assumptions undergirding traditional U.S. foreign-policy thinking. To a remarkable degree, he is willing to question why America’s enemies are its enemies, or why some of its friends are its friends.

It is assumed, at least among his critics, that Obama sought the Iran deal because he has a vision of a historic American-Persian rapprochement. But his desire for the nuclear agreement was born of pessimism as much as it was of optimism. “The Iran deal was never primarily about trying to open a new era of relations between the U.S. and Iran,” Susan Rice told me. “It was far more pragmatic and minimalist. The aim was very simply to make a dangerous country substantially less dangerous. No one had any expectation that Iran would be a more benign actor.”

once mentioned to obama a scene from The Godfather: Part III, in which Michael Corleone complains angrily about his failure to escape the grasp of organized crime. I told Obama that the Middle East is to his presidency what the Mob is to Corleone, and I started to quote the Al Pacino line: “Just when I thought I was out—”“It pulls you back in,” Obama said, completing the thought

When I asked Obama recently what he had hoped to accomplish with his Cairo reset speech, he said that he had been trying—unsuccessfully, he acknowledged—to persuade Muslims to more closely examine the roots of their unhappiness.“My argument was this: Let’s all stop pretending that the cause of the Middle East’s problems is Israel,” he told me. “We want to work to help achieve statehood and dignity for the Palestinians, but I was hoping that my speech could trigger a discussion, could create space for Muslims to address the real problems they are confronting—problems of governance, and the fact that some currents of Islam have not gone through a reformation that would help people adapt their religious doctrines to modernity. My thought was, I would communicate that the U.S. is not standing in the way of this progress, that we would help, in whatever way possible, to advance the goals of a practical, successful Arab agenda that provided a better life for ordinary people.”

But over the next three years, as the Arab Spring gave up its early promise, and brutality and dysfunction overwhelmed the Middle East, the president grew disillusioned. Some of his deepest disappointments concern Middle Eastern leaders themselves. Benjamin Netanyahu is in his own category: Obama has long believed that Netanyahu could bring about a two-state solution that would protect Israel’s status as a Jewish-majority democracy, but is too fearful and politically paralyzed to do so

Obama has also not had much patience for Netanyahu and other Middle Eastern leaders who question his understanding of the region. In one of Netanyahu’s meetings with the president, the Israeli prime minister launched into something of a lecture about the dangers of the brutal region in which he lives, and Obama felt that Netanyahu was behaving in a condescending fashion, and was also avoiding the subject at hand: peace negotiations. Finally, the president interrupted the prime minister: “Bibi, you have to understand something,” he said. “I’m the African American son of a single mother, and I live here, in this house. I live in the White House. I managed to get elected president of the United States. You think I don’t understand what you’re talking about, but I do.”

Other leaders also frustrate him immensely. Early on, Obama saw Recep Tayyip Erdoğan, the president of Turkey, as the sort of moderate Muslim leader who would bridge the divide between East and West—but Obama now considers him a failure and an authoritarian, one who refuses to use his enormous army to bring stability to Syria

In recent days, the president has taken to joking privately, “All I need in the Middle East is a few smart autocrats.” Obama has always had a fondness for pragmatic, emotionally contained technocrats, telling aides, “If only everyone could be like the Scandinavians, this would all be easy.”

The unraveling of the Arab Spring darkened the president’s view of what the U.S. could achieve in the Middle East, and made him realize how much the chaos there was distracting from other priorities. “The president recognized during the course of the Arab Spring that the Middle East was consuming us,”

But what sealed Obama’s fatalistic view was the failure of his administration’s intervention in Libya, in 2011

Obama says today of the intervention, “It didn’t work.” The U.S., he believes, planned the Libya operation carefully—and yet the country is still a disaster.

“So we actually executed this plan as well as I could have expected: We got a UN mandate, we built a coalition, it cost us $1 billion—which, when it comes to military operations, is very cheap. We averted large-scale civilian casualties, we prevented what almost surely would have been a prolonged and bloody civil conflict. And despite all that, Libya is a mess.”

Mess is the president’s diplomatic term; privately, he calls Libya a “shit show,” in part because it’s subsequently become an isis haven—one that he has already targeted with air strikes. It became a shit show, Obama believes, for reasons that had less to do with American incompetence than with the passivity of America’s allies and with the obdurate power of tribalism.

Of France, he said, “Sarkozy wanted to trumpet the flights he was taking in the air campaign, despite the fact that we had wiped out all the air defenses and essentially set up the entire infrastructure” for the intervention. This sort of bragging was fine, Obama said, because it allowed the U.S. to “purchase France’s involvement in a way that made it less expensive for us and less risky for us.” In other words, giving France extra credit in exchange for less risk and cost to the United States was a useful trade-off—except that “from the perspective of a lot of the folks in the foreign-policy establishment, well, that was terrible. If we’re going to do something, obviously we’ve got to be up front, and nobody else is sharing in the spotlight.”

Obama also blamed internal Libyan dynamics. “The degree of tribal division in Libya was greater than our analysts had expected. And our ability to have any kind of structure there that we could interact with and start training and start providing resources broke down very quickly.”

Libya proved to him that the Middle East was best avoided. “There is no way we should commit to governing the Middle East and North Africa,” he recently told a former colleague from the Senate. “That would be a basic, fundamental mistake.”

Obama did not come into office preoccupied by the Middle East. He is the first child of the Pacific to become president—born in Hawaii, raised there and, for four years, in Indonesia—and he is fixated on turning America’s attention to Asia

For Obama, Asia represents the future. Africa and Latin America, in his view, deserve far more U.S. attention than they receive. Europe, about which he is unromantic, is a source of global stability that requires, to his occasional annoyance, American hand-holding. And the Middle East is a region to be avoided—one that, thanks to America’s energy revolution, will soon be of negligible relevance to the U.S. economy.

Advisers recall that Obama would cite a pivotal moment in The Dark Knight, the 2008 Batman movie, to help explain not only how he understood the role of isis, but how he understood the larger ecosystem in which it grew. “There’s a scene in the beginning in which the gang leaders of Gotham are meeting,” the president would say. “These are men who had the city divided up. They were thugs, but there was a kind of order. Everyone had his turf. And then the Joker comes in and lights the whole city on fire. isil is the Joker. It has the capacity to set the whole region on fire. That’s why we have to fight it.”

The rise of the Islamic State deepened Obama’s conviction that the Middle East could not be fixed—not on his watch, and not for a generation to come.

The traveling White House press corps was unrelenting: “Isn’t it time for your strategy to change?” one reporter asked. This was followed by “Could I ask you to address your critics who say that your reluctance to enter another Middle East war, and your preference of diplomacy over using the military, makes the United States weaker and emboldens our enemies?” And then came this imperishable question, from a CNN reporter: “If you’ll forgive the language—why can’t we take out these bastards?” Which was followed by “Do you think you really understand this enemy well enough to defeat them and to protect the homeland?”

This rhetoric appeared to frustrate Obama immensely. “When I hear folks say that, well, maybe we should just admit the Christians but not the Muslims; when I hear political leaders suggesting that there would be a religious test for which person who’s fleeing from a war-torn country is admitted,” Obama told the assembled reporters, “that’s not American. That’s not who we are. We don’t have religious tests to our compassion.”

he has never believed that terrorism poses a threat to America commensurate with the fear it generates. Even during the period in 2014 when isis was executing its American captives in Syria, his emotions were in check. Valerie Jarrett, Obama’s closest adviser, told him people were worried that the group would soon take its beheading campaign to the U.S. “They’re not coming here to chop our heads off,” he reassured her.

Obama frequently reminds his staff that terrorism takes far fewer lives in America than handguns, car accidents, and falls in bathtubs do

Several years ago, he expressed to me his admiration for Israelis’ “resilience” in the face of constant terrorism, and it is clear that he would like to see resilience replace panic in American society. Nevertheless, his advisers are fighting a constant rearguard action to keep Obama from placing terrorism in what he considers its “proper” perspective, out of concern that he will seem insensitive to the fears of the American people.

When I noted to Kerry that the president’s rhetoric doesn’t match his, he said, “President Obama sees all of this, but he doesn’t gin it up into this kind of—he thinks we are on track. He has escalated his efforts. But he’s not trying to create hysteria … I think the president is always inclined to try to keep things on an appropriate equilibrium. I respect that.”

Obama modulates his discussion of terrorism for several reasons: He is, by nature, Spockian. And he believes that a misplaced word, or a frightened look, or an ill-considered hyperbolic claim, could tip the country into panic. The sort of panic he worries about most is the type that would manifest itself in anti-Muslim xenophobia or in a challenge to American openness and to the constitutional order.

The president also gets frustrated that terrorism keeps swamping his larger agenda, particularly as it relates to rebalancing America’s global priorities. For years, the “pivot to Asia” has been a paramount priority of his. America’s economic future lies in Asia, he believes, and the challenge posed by China’s rise requires constant attention. From his earliest days in office, Obama has been focused on rebuilding the sometimes-threadbare ties between the U.S. and its Asian treaty partners, and he is perpetually on the hunt for opportunities to draw other Asian nations into the U.S. orbit. His dramatic opening to Burma was one such opportunity; Vietnam and the entire constellation of Southeast Asian countries fearful of Chinese domination presented others.

Obama believes, Carter said, that Asia “is the part of the world of greatest consequence to the American future, and that no president can take his eye off of this.” He added, “He consistently asks, even in the midst of everything else that’s going on, ‘Where are we in the Asia-Pacific rebalance? Where are we in terms of resources?’ He’s been extremely consistent about that, even in times of Middle East tension.”

“Right now, I don’t think that anybody can be feeling good about the situation in the Middle East,” he said. “You have countries that are failing to provide prosperity and opportunity for their people. You’ve got a violent, extremist ideology, or ideologies, that are turbocharged through social media. You’ve got countries that have very few civic traditions, so that as autocratic regimes start fraying, the only organizing principles are sectarian.”

He went on, “Contrast that with Southeast Asia, which still has huge problems—enormous poverty, corruption—but is filled with striving, ambitious, energetic people who are every single day scratching and clawing to build businesses and get education and find jobs and build infrastructure. The contrast is pretty stark.”

In Asia, as well as in Latin America and Africa, Obama says, he sees young people yearning for self-improvement, modernity, education, and material wealth.“They are not thinking about how to kill Americans,” he says. “What they’re thinking about is How do I get a better education? How do I create something of value?”

He then made an observation that I came to realize was representative of his bleakest, most visceral understanding of the Middle East today—not the sort of understanding that a White House still oriented around themes of hope and change might choose to advertise. “If we’re not talking to them,” he said, referring to young Asians and Africans and Latin Americans, “because the only thing we’re doing is figuring out how to destroy or cordon off or control the malicious, nihilistic, violent parts of humanity, then we’re missing the boat.

He does resist refracting radical Islam through the “clash of civilizations” prism popularized by the late political scientist Samuel Huntington. But this is because, he and his advisers argue, he does not want to enlarge the ranks of the enemy. “The goal is not to force a Huntington template onto this conflict,” said John Brennan, the CIA director.

“It is very clear what I mean,” he told me, “which is that there is a violent, radical, fanatical, nihilistic interpretation of Islam by a faction—a tiny faction—within the Muslim community that is our enemy, and that has to be defeated.”

“There is also the need for Islam as a whole to challenge that interpretation of Islam, to isolate it, and to undergo a vigorous discussion within their community about how Islam works as part of a peaceful, modern society,” he said. But he added, “I do not persuade peaceful, tolerant Muslims to engage in that debate if I’m not sensitive to their concern that they are being tagged with a broad brush.”

In private encounters with other world leaders, Obama has argued that there will be no comprehensive solution to Islamist terrorism until Islam reconciles itself to modernity and undergoes some of the reforms that have changed Christianity.

, Obama described how he has watched Indonesia gradually move from a relaxed, syncretistic Islam to a more fundamentalist, unforgiving interpretation; large numbers of Indonesian women, he observed, have now adopted the hijab, the Muslim head covering.

Why, Turnbull asked, was this happening?Because, Obama answered, the Saudis and other Gulf Arabs have funneled money, and large numbers of imams and teachers, into the country. In the 1990s, the Saudis heavily funded Wahhabist madrassas, seminaries that teach the fundamentalist version of Islam favored by the Saudi ruling family, Obama told Turnbull. Today, Islam in Indonesia is much more Arab in orientation than it was when he lived there, he said.

“Aren’t the Saudis your friends?,” Turnbull asked.Obama smiled. “It’s complicated,” he said.

But he went on to say that the Saudis need to “share” the Middle East with their Iranian foes. “The competition between the Saudis and the Iranians—which has helped to feed proxy wars and chaos in Syria and Iraq and Yemen—requires us to say to our friends as well as to the Iranians that they need to find an effective way to share the neighborhood and institute some sort of cold peace,”

“An approach that said to our friends ‘You are right, Iran is the source of all problems, and we will support you in dealing with Iran’ would essentially mean that as these sectarian conflicts continue to rage and our Gulf partners, our traditional friends, do not have the ability to put out the flames on their own or decisively win on their own, and would mean that we have to start coming in and using our military power to settle scores. And that would be in the interest neither of the United States nor of the Middle East.”

One of the most destructive forces in the Middle East, Obama believes, is tribalism—a force no president can neutralize. Tribalism, made manifest in the reversion to sect, creed, clan, and village by the desperate citizens of failing states, is the source of much of the Muslim Middle East’s problems, and it is another source of his fatalism. Obama has deep respect for the destructive resilience of tribalism—part of his memoir, Dreams From My Father, concerns the way in which tribalism in post-colonial Kenya helped ruin his father’s life—which goes some distance in explaining why he is so fastidious about avoiding entanglements in tribal conflicts.

“It is literally in my DNA to be suspicious of tribalism,” he told me. “I understand the tribal impulse, and acknowledge the power of tribal division. I’ve been navigating tribal divisions my whole life. In the end, it’s the source of a lot of destructive acts.”

“Look, I am not of the view that human beings are inherently evil,” he said. “I believe that there’s more good than bad in humanity. And if you look at the trajectory of history, I am optimistic.

“I believe that overall, humanity has become less violent, more tolerant, healthier, better fed, more empathetic, more able to manage difference. But it’s hugely uneven. And what has been clear throughout the 20th and 21st centuries is that the progress we make in social order and taming our baser impulses and steadying our fears can be reversed very quickly. Social order starts breaking down if people are under profound stress. Then the default position is tribe—us/them, a hostility toward the unfamiliar or the unknown.”

He continued, “Right now, across the globe, you’re seeing places that are undergoing severe stress because of globalization, because of the collision of cultures brought about by the Internet and social media, because of scarcities—some of which will be attributable to climate change over the next several decades—because of population growth. And in those places, the Middle East being Exhibit A, the default position for a lot of folks is to organize tightly in the tribe and to push back or strike out against those who are different.

“A group like isil is the distillation of every worst impulse along these lines. The notion that we are a small group that defines ourselves primarily by the degree to which we can kill others who are not like us, and attempting to impose a rigid orthodoxy that produces nothing, that celebrates nothing, that really is contrary to every bit of human progress—it indicates the degree to which that kind of mentality can still take root and gain adherents in the 21st century.”

“We have to determine the best tools to roll back those kinds of attitudes,” he said. “There are going to be times where either because it’s not a direct threat to us or because we just don’t have the tools in our toolkit to have a huge impact that, tragically, we have to refrain from jumping in with both feet.”

I asked Obama whether he would have sent the Marines to Rwanda in 1994 to stop the genocide as it was happening, had he been president at the time. “Given the speed with which the killing took place, and how long it takes to crank up the machinery of the U.S. government, I understand why we did not act fast enough,” he said. “Now, we should learn from tha

I actually think that Rwanda is an interesting test case because it’s possible—not guaranteed, but it’s possible—that this was a situation where the quick application of force might have been enough.

“Ironically, it’s probably easier to make an argument that a relatively small force inserted quickly with international support would have resulted in averting genocide [more successfully in Rwanda] than in Syria right now, where the degree to which the various groups are armed and hardened fighters and are supported by a whole host of external actors with a lot of resources requires a much larger commitment of forces.”

The Turkey press conference, I told him, “was a moment for you as a politician to say, ‘Yeah, I hate the bastards too, and by the way, I am taking out the bastards.’ ” The easy thing to do would have been to reassure Americans in visceral terms that he will kill the people who want to kill them. Does he fear a knee-jerk reaction in the direction of another Middle East invasion? Or is he just inalterably Spockian?

“Every president has strengths and weaknesses,” he answered. “And there is no doubt that there are times where I have not been attentive enough to feelings and emotions and politics in communicating what we’re doing and how we’re doing it.”

But for America to be successful in leading the world, he continued, “I believe that we have to avoid being simplistic. I think we have to build resilience and make sure that our political debates are grounded in reality. It’s not that I don’t appreciate the value of theater in political communications; it’s that the habits we—the media, politicians—have gotten into, and how we talk about these issues, are so detached so often from what we need to be doing that for me to satisfy the cable news hype-fest would lead to us making worse and worse decisions over time.”

“During the couple of months in which everybody was sure Ebola was going to destroy the Earth and there was 24/7 coverage of Ebola, if I had fed the panic or in any way strayed from ‘Here are the facts, here’s what needs to be done, here’s how we’re handling it, the likelihood of you getting Ebola is very slim, and here’s what we need to do both domestically and overseas to stamp out this epidemic,’ ” then “maybe people would have said ‘Obama is taking this as seriously as he needs to be.’ ” But feeding the panic by overreacting could have shut down travel to and from three African countries that were already cripplingly poor, in ways that might have destroyed their economies—which would likely have meant, among other things, a recurrence of Ebola. He added, “It would have also meant that we might have wasted a huge amount of resources in our public-health systems that need to be devoted to flu vaccinations and other things that actually kill people” in large numbers in America

“I have friends who have kids in Paris right now,” he said. “And you and I and a whole bunch of people who are writing about what happened in Paris have strolled along the same streets where people were gunned down. And it’s right to feel fearful. And it’s important for us not to ever get complacent. There’s a difference between resilience and complacency.” He went on to describe another difference—between making considered decisions and making rash, emotional ones. “What it means, actually, is that you care so much that you want to get it right and you’re not going to indulge in either impetuous or, in some cases, manufactured responses that make good sound bites but don’t produce results. The stakes are too high to play those games.”

The other meeting took place two months later, in the Oval Office, between Obama and the general secretary of the Vietnamese Communist Party, Nguyen Phu Trong. This meeting took place only because John Kerry had pushed the White House to violate protocol, since the general secretary was not a head of state. But the goals trumped decorum: Obama wanted to lobby the Vietnamese on the Trans-Pacific Partnership—his negotiators soon extracted a promise from the Vietnamese that they would legalize independent labor unions—and he wanted to deepen cooperation on strategic issues. Administration officials have repeatedly hinted to me that Vietnam may one day soon host a permanent U.S. military presence, to check the ambitions of the country it now fears most, China. The U.S. Navy’s return to Cam Ranh Bay would count as one of the more improbable developments in recent American history. “We just moved the Vietnamese Communist Party to recognize labor rights in a way that we could never do by bullying them or scaring them,” Obama told me, calling this a key victory in his campaign to replace stick-waving with diplomatic persuasion.

I noted that the 200 or so young Southeast Asians in the room earlier that day—including citizens of Communist-ruled countries—seemed to love America. “They do,” Obama said. “In Vietnam right now, America polls at 80 percent.”

The resurgent popularity of America throughout Southeast Asia means that “we can do really big, important stuff—which, by the way, then has ramifications across the board,” he said, “because when Malaysia joins the anti-isil campaign, that helps us leverage resources and credibility in our fight against terrorism. When we have strong relations with Indonesia, that helps us when we are going to Paris and trying to negotiate a climate treaty, where the temptation of a Russia or some of these other countries may be to skew the deal in a way that is unhelpful.

Obama then cited America’s increased influence in Latin America—increased, he said, in part by his removal of a region-wide stumbling block when he reestablished ties with Cuba—as proof that his deliberate, nonthreatening, diplomacy-centered approach to foreign relations is working. The alba movement, a group of Latin American governments oriented around anti-Americanism, has significantly weakened during his time as president. “When I came into office, at the first Summit of the Americas that I attended, Hugo Chávez”—the late anti-American Venezuelan dictator—“was still the dominant figure in the conversation,” he said. “We made a very strategic decision early on, which was, rather than blow him up as this 10-foot giant adversary, to right-size the problem and say, ‘We don’t like what’s going on in Venezuela, but it’s not a threat to the United States.’

Obama said that to achieve this rebalancing, the U.S. had to absorb the diatribes and insults of superannuated Castro manqués. “When I saw Chávez, I shook his hand and he handed me a Marxist critique of the U.S.–Latin America relationship,” Obama recalled. “And I had to sit there and listen to Ortega”—Daniel Ortega, the radical leftist president of Nicaragua—“make an hour-long rant against the United States. But us being there, not taking all that stuff seriously—because it really wasn’t a threat to us”—helped neutralize the region’s anti-Americanism.

“The truth is, actually, Putin, in all of our meetings, is scrupulously polite, very frank. Our meetings are very businesslike. He never keeps me waiting two hours like he does a bunch of these other folks.” Obama said that Putin believes his relationship with the U.S. is more important than Americans tend to think. “He’s constantly interested in being seen as our peer and as working with us, because he’s not completely stupid. He understands that Russia’s overall position in the world is significantly diminished. And the fact that he invades Crimea or is trying to prop up Assad doesn’t suddenly make him a player.

“The argument is made,” I said, “that Vladimir Putin watched you in Syria and thought, He’s too logical, he’s too rational, he’s too into retrenchment. I’m going to push him a little bit further in Ukraine.”

“Look, this theory is so easily disposed of that I’m always puzzled by how people make the argument. I don’t think anybody thought that George W. Bush was overly rational or cautious in his use of military force. And as I recall, because apparently nobody in this town does, Putin went into Georgia on Bush’s watch, right smack dab in the middle of us having over 100,000 troops deployed in Iraq.” Obama was referring to Putin’s 2008 invasion of Georgia, a former Soviet republic, which was undertaken for many of the same reasons Putin later invaded Ukraine—to keep an ex–Soviet republic in Russia’s sphere of influence.

“Putin acted in Ukraine in response to a client state that was about to slip out of his grasp. And he improvised in a way to hang on to his control there,” he said. “He’s done the exact same thing in Syria, at enormous cost to the well-being of his own country. And the notion that somehow Russia is in a stronger position now, in Syria or in Ukraine, than they were before they invaded Ukraine or before he had to deploy military forces to Syria is to fundamentally misunderstand the nature of power in foreign affairs or in the world generally. Real power means you can get what you want without having to exert violence. Russia was much more powerful when Ukraine looked like an independent country but was a kleptocracy that he could pull the strings on.”

Obama’s theory here is simple: Ukraine is a core Russian interest but not an American one, so Russia will always be able to maintain escalatory dominance there.“The fact is that Ukraine, which is a non-nato country, is going to be vulnerable to military domination by Russia no matter what we do,” he said.

“I think that the best argument you can make on the side of those who are critics of my foreign policy is that the president doesn’t exploit ambiguity enough. He doesn’t maybe react in ways that might cause people to think, Wow, this guy might be a little crazy.”“The ‘crazy Nixon’ approach,” I said: Confuse and frighten your enemies by making them think you’re capable of committing irrational acts.

“But let’s examine the Nixon theory,” he said. “So we dropped more ordnance on Cambodia and Laos than on Europe in World War II, and yet, ultimately, Nixon withdrew, Kissinger went to Paris, and all we left behind was chaos, slaughter, and authoritarian governments

“There is no evidence in modern American foreign policy that that’s how people respond. People respond based on what their imperatives are, and if it’s really important to somebody, and it’s not that important to us, they know that, and we know that,” he said. “There are ways to deter, but it requires you to be very clear ahead of time about what is worth going to war for and what is not.

Now, if there is somebody in this town that would claim that we would consider going to war with Russia over Crimea and eastern Ukraine, they should speak up and be very clear about it. The idea that talking tough or engaging in some military action that is tangential to that particular area is somehow going to influence the decision making of Russia or China is contrary to all the evidence we have seen over the last 50 years.”

“If you think about, let’s say, the Iran hostage crisis, there is a narrative that has been promoted today by some of the Republican candidates that the day Reagan was elected, because he looked tough, the Iranians decided, ‘We better turn over these hostages,’ ” he said. “In fact what had happened was that there was a long negotiation with the Iranians and because they so disliked Carter—even though the negotiations had been completed—they held those hostages until the day Reagan got elected

When you think of the military actions that Reagan took, you have Grenada—which is hard to argue helped our ability to shape world events, although it was good politics for him back home. You have the Iran-Contra affair, in which we supported right-wing paramilitaries and did nothing to enhance our image in Central America, and it wasn’t successful at all.” He reminded me that Reagan’s great foe, Daniel Ortega, is today the unrepentant president of Nicaragua.

Obama also cited Reagan’s decision to almost immediately pull U.S. forces from Lebanon after 241 servicemen were killed in a Hezbollah attack in 1983. “Apparently all these things really helped us gain credibility with the Russians and the Chinese,” because “that’s the narrative that is told,” he said sarcastically.

“Now, I actually think that Ronald Reagan had a great success in foreign policy, which was to recognize the opportunity that Gorbachev presented and to engage in extensive diplomacy—which was roundly criticized by some of the same people who now use Ronald Reagan to promote the notion that we should go around bombing people.”

“As I survey the next 20 years, climate change worries me profoundly because of the effects that it has on all the other problems that we face,” he said. “If you start seeing more severe drought; more significant famine; more displacement from the Indian subcontinent and coastal regions in Africa and Asia; the continuing problems of scarcity, refugees, poverty, disease—this makes every other problem we’ve got worse. That’s above and beyond just the existential issues of a planet that starts getting into a bad feedback loop.”

Terrorism, he said, is also a long-term problem “when combined with the problem of failed states.”

What country does he consider the greatest challenge to America in the coming decades? “In terms of traditional great-state relations, I do believe that the relationship between the United States and China is going to be the most critical,” he said. “If we get that right and China continues on a peaceful rise, then we have a partner that is growing in capability and sharing with us the burdens and responsibilities of maintaining an international order. If China fails; if it is not able to maintain a trajectory that satisfies its population and has to resort to nationalism as an organizing principle; if it feels so overwhelmed that it never takes on the responsibilities of a country its size in maintaining the international order; if it views the world only in terms of regional spheres of influence—then not only do we see the potential for conflict with China, but we will find ourselves having more difficulty dealing with these other challenges that are going to come.”

I’ve been very explicit in saying that we have more to fear from a weakened, threatened China than a successful, rising China,” Obama said. “I think we have to be firm where China’s actions are undermining international interests, and if you look at how we’ve operated in the South China Sea, we have been able to mobilize most of Asia to isolate China in ways that have surprised China, frankly, and have very much served our interest in strengthening our alliances.”

A weak, flailing Russia constitutes a threat as well, though not quite a top-tier threat. “Unlike China, they have demographic problems, economic structural problems, that would require not only vision but a generation to overcome,” Obama said. “The path that Putin is taking is not going to help them overcome those challenges. But in that environment, the temptation to project military force to show greatness is strong, and that’s what Putin’s inclination is. So I don’t underestimate the dangers there.”

“You know, the notion that diplomacy and technocrats and bureaucrats somehow are helping to keep America safe and secure, most people think, Eh, that’s nonsense. But it’s true. And by the way, it’s the element of American power that the rest of the world appreciates unambiguously

When we deploy troops, there’s always a sense on the part of other countries that, even where necessary, sovereignty is being violated.”

Administration officials have told me that Vice President Biden, too, has become frustrated with Kerry’s demands for action. He has said privately to the secretary of state, “John, remember Vietnam? Remember how that started?” At a National Security Council meeting held at the Pentagon in December, Obama announced that no one except the secretary of defense should bring him proposals for military action. Pentagon officials understood Obama’s announcement to be a brushback pitch directed at Kerry.

Obama’s caution on Syria has vexed those in the administration who have seen opportunities, at different moments over the past four years, to tilt the battlefield against Assad. Some thought that Putin’s decision to fight on behalf of Assad would prompt Obama to intensify American efforts to help anti-regime rebels. But Obama, at least as of this writing, would not be moved, in part because he believed that it was not his business to stop Russia from making what he thought was a terrible mistake. “They are overextended. They’re bleeding,” he told me. “And their economy has contracted for three years in a row, drastically.

Obama’s strategy was occasionally referred to as the “Tom Sawyer approach.” Obama’s view was that if Putin wanted to expend his regime’s resources by painting the fence in Syria, the U.S. should let him.

By late winter, though, when it appeared that Russia was making advances in its campaign to solidify Assad’s rule, the White House began discussing ways to deepen support for the rebels, though the president’s ambivalence about more-extensive engagement remained. In conversations I had with National Security Council officials over the past couple of months, I sensed a foreboding that an event—another San Bernardino–style attack, for instance—would compel the United States to take new and direct action in Syria. For Obama, this would be a nightmare.

If there had been no Iraq, no Afghanistan, and no Libya, Obama told me, he might be more apt to take risks in Syria. “A president does not make decisions in a vacuum. He does not have a blank slate. Any president who was thoughtful, I believe, would recognize that after over a decade of war, with obligations that are still to this day requiring great amounts of resources and attention in Afghanistan, with the experience of Iraq, with the strains that it’s placed on our military—any thoughtful president would hesitate about making a renewed commitment in the exact same region of the world with some of the exact same dynamics and the same probability of an unsatisfactory outcome.”

What has struck me is that, even as his secretary of state warns about a dire, Syria-fueled European apocalypse, Obama has not recategorized the country’s civil war as a top-tier security threat.

This critique frustrates the president. “Nobody remembers bin Laden anymore,” he says. “Nobody talks about me ordering 30,000 more troops into Afghanistan.” The red-line crisis, he said, “is the point of the inverted pyramid upon which all other theories rest.

“Was it a bluff?” I told him that few people now believe he actually would have attacked Iran to keep it from getting a nuclear weapon.“That’s interesting,” he said, noncommittally.I started to talk: “Do you—”He interrupted. “I actually would have,” he said, meaning that he would have struck Iran’s nuclear facilities. “If I saw them break out.”

“You were right to believe it,” the president said. And then he made his key point. “This was in the category of an American interest.”

I was reminded then of something Derek Chollet, a former National Security Council official, told me: “Obama is a gambler, not a bluffer.”

The president has placed some huge bets. Last May, as he was trying to move the Iran nuclear deal through Congress, I told him that the agreement was making me nervous. His response was telling. “Look, 20 years from now, I’m still going to be around, God willing. If Iran has a nuclear weapon, it’s my name on this,” he said. “I think it’s fair to say that in addition to our profound national-security interests, I have a personal interest in locking this down.”

In the matter of the Syrian regime and its Iranian and Russian sponsors, Obama has bet, and seems prepared to continue betting, that the price of direct U.S. action would be higher than the price of inaction. And he is sanguine enough to live with the perilous ambiguities of his decisions

Though in his Nobel Peace Prize speech in 2009, Obama said, “Inaction tears at our conscience and can lead to more costly intervention later,” today the opinions of humanitarian interventionists do not seem to move him, at least not publicly

As he comes to the end of his presidency, Obama believes he has done his country a large favor by keeping it out of the maelstrom—and he believes, I suspect, that historians will one day judge him wise for having done so

Inside the West Wing, officials say that Obama, as a president who inherited a financial crisis and two active wars from his predecessor, is keen to leave “a clean barn” to whoever succeeds him. This is why the fight against isis, a group he considers to be a direct, though not existential, threat to the U.S., is his most urgent priority for the remainder of his presidency; killing the so-called caliph of the Islamic State, Abu Bakr al-Baghdadi, is one of the top goals of the American national-security apparatus in Obama’s last year.

This is what is so controversial about the president’s approach, and what will be controversial for years to come—the standard he has used to define what, exactly, constitutes a direct threat.

Obama has come to a number of dovetailing conclusions about the world, and about America’s role in it. The first is that the Middle East is no longer terribly important to American interests. The second is that even if the Middle East were surpassingly important, there would still be little an American president could do to make it a better place. The third is that the innate American desire to fix the sorts of problems that manifest themselves most drastically in the Middle East inevitably leads to warfare, to the deaths of U.S. soldiers, and to the eventual hemorrhaging of U.S. credibility and power. The fourth is that the world cannot afford to see the diminishment of U.S. power. Just as the leaders of several American allies have found Obama’s leadership inadequate to the tasks before him, he himself has found world leadership wanting: global partners who often lack the vision and the will to spend political capital in pursuit of broad, progressive goals, and adversaries who are not, in his mind, as rational as he is. Obama believes that history has sides, and that America’s adversaries—and some of its putative allies—have situated themselves on the wrong one, a place where tribalism, fundamentalism, sectarianism, and militarism still flourish. What they don’t understand is that history is bending in his direction.

“The central argument is that by keeping America from immersing itself in the crises of the Middle East, the foreign-policy establishment believes that the president is precipitating our decline,” Ben Rhodes told me. “But the president himself takes the opposite view, which is that overextension in the Middle East will ultimately harm our economy, harm our ability to look for other opportunities and to deal with other challenges, and, most important, endanger the lives of American service members for reasons that are not in the direct American national-security interest.

George W. Bush was also a gambler, not a bluffer. He will be remembered harshly for the things he did in the Middle East. Barack Obama is gambling that he will be judged well for the things he didn’t do.

German Chancellor Angela Merkel and Dutch Prime Minister Mark Rutte met their Turkish counterpart, Ahmet Davutoglu, at the Turkish embassy in Brussels late on Sunday to prepare for the summit.

On Sunday, reports from the area said Macedonia had stopped allowing entry to anyone from areas in Iraq and Syria it did not consider to be active conflict zones

Previous rounds of negotiations with North Korea, some lasting years, have all failed to persuade Pyongyang to change course as it has worked to advance its ability to strike the U.S. with nuclear weapons. As recently as a few months ag

North Korea warned it was contemplating a missile attack aimed at the U.S. Pacific territory of Guam.

ushing ahead with increasingly stringent economic sanctions aimed at curbing the country’s access to funds and fuel—and forcing it to abandon its atomic ambitions.

“It would be the first inter-Korean summit at a neutral location, so Moon can avoid the optics of appearing to pay tribute to Kim in Pyongyang,”

Senior U.S. officials have expressed doubts about the opening as a propaganda ploy meant to drive a wedge between Seoul and Washington, but have publicly said they support South Korean efforts to bring Pyongyang to the negotiating table.

Kim Dong-yub, a professor of security studies at Kyungnam University, said North Korea could work to divide Washington or Seoul by insisting that a security guarantee involve the removal of U.S. troops from the Korean peninsula. “What defines security?” he said. North Korea has said repeatedly in recent years that the only true guarantee of its security was its possession of nuclear weapons. It reiterated the same idea on Tuesday, even as the South Korean delegation prepared to return home to Seoul.

Seoul’s delegation to the North had expected Mr. Kim to raise issues with annual springtime military exercises with the U.S., but the North Korean leader said he understood the need for them and didn’t push the point, a senior Seoul official said. North Korea has complained about the exercises, saying they are a rehearsal for invasion. Pyongyang last month warned the two allies that going ahead with them would go “against the climate of detente on the Korean Peninsula” and spell the end of the current thaw.

The two Koreas agreed to hold a summit between their leaders at the truce village of Panmunjom in the demilitarized zone that separates the peninsula —rather than in Pyongyang, the site of the two previous inter-Korean summits in 2000 and 2007.

As the restrictions have tightened, North Korea has reached out to the South. Relations between the two began a nascent thaw ahead of the recent Winter Olympics.

North Korean leader Kim Jong Un told a visiting South Korean delegation that he was willing to hold talks with the U.S. about giving up nuclear weapons and would halt weapons tests during any negotiations, officials in Seoul said Tuesday.

“It is unlikely Kim Jong Un has abandoned his determination to keep nuclear weapons indefinitely,” said Robert J. Einhorn, a former senior State Department official who negotiated with North Korean officials during the Clinton administration.

American officials repeatedly have said North Korea still needs to carry out additional flight tests before it can be confident that it has the capability to strike the U.S. with a long-range, nuclear-armed missile.

Whether negotiations would produce more significant results is questionable.”

Beyond doubts about what Pyongyang will offer at the table, some U.S. officials also worry that North Korea will seek to use negotiations to create divisions between Seoul and Washington and blunt the American-led efforts to maintain tough economic sanctions.

Mr. Kim suggested his country might be willing to participate in the Winter Olympics in South Korea and Mr. Moon responded by proposing inter-Korean talks.

“They may mean it is a long-term objective and we may want them to denuclearize overnight,” said Joel S. Wit, a senior fellow at the U.S.-Korea Institute at Johns Hopkins and a former State Department official.

Other difficult issues would include negotiating a peace treaty to formally end the Korean War, normalizing relations with the U.S. and determining when economic sanctions against North Korea would be eased and ultimately eliminated.

The president emphasized that conciliatory tone with a tweet early Friday, saying “the warm and productive statement from North Korea” could lead “hopefully to long and enduring prosperity and peace.”