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Already around 2500 BC, merchants were setting out from what is now Iraq, the seat of the ancient Sumerian civilization, carrying silver ingots to India

En route, they acquired copper from Oman and brought precious objects such as carnelian and lapis lazuli from India. Accumulating and re-investing profits, they were the first capitalists. The Indian Ocean became one of the great channels of trade between nations. Greek merchants from Egypt exploited the monsoon winds to ensure a swift passage to south India.

The Chinese emperors tended to discourage uncontrolled trade, though prohibitions often did more to provoke traders into finding ways around the rules. Early compasses were used for feng shui, not navigation. But in the 12th century AD, when the coasts of China were open to the world, Hangzhou was at the peak of its prosperity.

in the open Pacific, hundreds of scattered islands from Hawaii to Easter Island were settled over many centuries — the Polynesians only reached New Zealand around AD 1300. Even without written records, the Polynesians transmitted exact knowledge of how to sail these apparently boundless waters from generation to generation.

By 1500 AD, the Portuguese had begun to show interest in what the Atlantic might offer. That interest had resulted in the settlement of uninhabited islands including Madeira, which began to export phenomenal quantities of sugar.

When European sailors — from Portugal, Spain, Holland, England, Denmark and France — entered the Pacific and the Indian Ocean starting in the 16th century, they found a lively maritime world that they could never truly dominate. They still depended on the resources and supply lines of the inhabitants of the lands they visited, even as they created routes across the entire globe

Since then, the oceans have only continued to tie the world together — most dramatically when new routes were literally carved out, with the building of the Suez Canal in the 19th century and the opening of the Panama Canal in 1914. The first goods to pass through the Panama Canal consisted of a cargo of tinned pineapples from Hawaii. The Pacific and the Atlantic were more closely tied together than ever before.

In the 21st century, however, new factors have changed entirely the way goods are carried across the seas, even though over 90% of world trade is carried on ships

Business is conducted on a scale that utterly dwarfs that of even 20 years ago, transforming a familiar world. And yet, through trade and cultural exchange, the seas continue to connect even the most distant lands.

The top priorities were protecting against terrorist threats, protecting jobs for American workers and reducing illegal immigration. These are all negative aspirations: preventing bad things from hostile outsiders.

The problem is that voters are now actively hostile to the project. Instead of widening the circle of concern, most Americans want the U.S. to simply look after itself.

Researchers from the Center for American Progress recently completed a survey of American foreign policy views. They write: “When asked what the phrase ‘maintaining the liberal international order’ indicated to them, all but one of the participants in our focus groups drew a blank. Voters across educational lines simply did not understand what any of these phrases … meant or implied.”

The lowest priorities were promoting democracy, taking on Chinese aggression, promoting trade, fighting global poverty and defending human rights. The things Americans care least about are the core activities of building a civilized global community.

many Americans have lost faith in human nature and human possibility.

social trust has collapsed over the decades, especially among the young. Distrustful, alienated people don’t want to get involved in the strange, hostile, outside world.

On the left there are the New Doves. These are young people who express high interest in human rights, but having grown up in the Iraq era, they don’t want the U.S. to get involved in protecting them

The C.A.P. study estimates that less than a fifth of voters are traditional internationalists. The Eurasia Group study estimates that only 9.5 percent are.

America is withdrawing from the world; the results are there for all to see. China is cracking down on democratic rights in Hong Kong. Russia launches cyberattacks everywhere. Iran is destabilizing the Middle East. The era of great power rivalry is coming back.

We’re in a dark spiral. Americans take a dark view of human nature and withdraw from the world. Wolves like Putin and Xi fill the void and make bad things happen, confirming the dark view and causing even more withdrawal.

The S&P 1500 airlines index added 1.5% as carriers are set to receive $15 billion in addition payroll assistance under the new government aid.

Ten of the 11 major S&P sectors were higher

After a sharp recovery from a coronavirus crash in March, the S&P 500 is on track to rise more than 15% this year

it appears unlikely to gain traction in the Republican-controlled Senate.

will put to vote a proposal for higher pandemic relief payments

Britain and the European Union clinched a lean post-Brexit trade deal on Thursday, while the launch of a mass COVID-19 vaccination drive in Europe over the weekend added to the upbeat mood.

reflects the advancements in technology and interest in astronomy of the time, for instance Petrus Apianus’ Astronomicum Caesareum (25.17ArtworkMichael Ostendorfer Astronomicum Caesareum ). This extraordinary Renaissance book contains equatoria supplied with paper volvelles, or rotating dials, that can be used for calculating positions of the planets on any given date as seen from a given terrestrial location. The celestial globe with clockwork (17.190.636) is another magnificent example of an aid for predicting astronomical events, in this case the location of stars as seen from a given place on earth at a given time and date. The globe also illustrates the sun’s apparent movement through the constellations of the zodiac.

Portable devices were also made for determining the time in a specific latitude. During the late fifteenth and early sixteenth centuries, the combination of compass and sundial became an aid for travelers.

Central to Islamic beliefs are the Five Pillars of Faith, which all followers of Islam — called Muslims — must follow:: There is only one universal God: Allah. Followers of Islam (Muslims) are expected to pray five times each day while facing Mecca. All Muslims are expected to pay a yearly tax that is mostly intended to help the poor and needy. For the entire month of Ramadan, Muslims must not eat, smoke, drink, or have sexual relations from sunrise to sunset. All able Muslims must make a pilgrimage (hajj) to Mecca at least once in their lifetimes.

Muhammad's message was especially well received by the poor and slaves.

In 622, fearing for his life, Muhammad fled to the town of Medina. This flight from Mecca to Medina became known as the Hegira

Muhammad fought a number of battles against the people of Mecca. In 629, Muhammad returned to Mecca with an army of 1500 converts to Islam and entered the city unopposed and without bloodshed. Before his death two years later, he forcefully converted most of the Arabian Peninsula to his new faith and built a small empire.

Unfortunately, Muhammad had not designated a successor. The struggle over leadership that followed his death has divided Muslims to this day, creating a division in Islam between the Sunnis and Shiites.

Despite these problems, a vast Islamic empire was created over the next 12 centuries that would build a base of worshipers unrivaled by any other religion.

consider for a moment that even China has Coronavirus under control by now. The only nations which don’t — again — are either desperately poor, or failed societies, or both. But that’s just what Coronavirus tells us is true of America, now, too

But to cause an extinction event on the scale of those seen millions of years ago, in which more than 75 percent of species disappeared, we would have to lose all our threatened species within a century and then keep losing species at that same super-high rate for between 240 and 540 more years. In other words, the concept assumes that we won’t save anything, ever, and that hundreds of years into the future, we will still be as inept at protecting biodiversity as we are now.

That’s just not true. As of today, according to the International Union for Conservation of Nature’s Red List, the conservation status of 128,918 species has been assessed. Of those, 902 have gone extinct since the year 1500. This is absolutely too many. One is too many.

this study actually looked at the average decline of a given population (not species) of wild animal. So severe declines in small populations disproportionately increase the average decline.

You might have also heard that we’ve lost something like 60 percent of wild animals since the 1970s? Surely this suggests that a lot more extinctions are imminent?

More recently, a new analysis of the data showed that, indeed, the 60 percent average decline was driven by very severe crashes in a very small number of vertebrate populations. For example, one small population of Australian waterfall frogs declined 99.5 percent over two years. This decline became one data point, which was averaged with 14,000 others, many from stable or increasing populations.

Really, less than 3 percent of vertebrate populations are crashing

This means that declines are not the rule everywhere. It means that the specific populations in crisis can be identified and helped. And we have the knowledge to save them, if we can marshal the will and resources.

This targeted approach works for environmental policy too. The Trump administration pushed for more than 100 rollbacks of pollution standards, land protections, and other green policies,

Jill Tauber, the vice president of litigation for climate and energy at Earthjustice, told me that her organization has more than 100 lawsuits pending against the Trump administration and that so far, once cases pass any procedural hurdles, her side is winning more than 80 percent of them

The U.S. could spend about what it already spends on energy—a mere 4 to 6 percent of gross domestic product—and still reach this goal, according to a new report out of Princeton University.

as the cost of key technologies such as solar panels and batteries has fallen, the price tag to move the country to net-zero emissions by 2050—as President Joe Biden has pledged—has also dropped

The necessary changes would have to start immediately, and they aren’t minor. Visualize a huge build-out of solar, wind, and transmission lines, for starters

What they need to be able to say clearly to politicians is: ‘I value this; this is an important priority to me.’

To make it happen, though, American citizens must “create a demand for the policy,”

On Wednesday, Biden signed an executive order on climate, which sets a goal of conserving at least 30 percent of the country by 2030, launches a Civilian Climate Corps, and hits pause on fossil-fuel development on public lands

“If we don’t keep up that demand for policy, then it is just not going to happen,”

Jenkins also rejects the idea that if we fail to keep warming under 1.5 degrees Celsius, the key target in an influential United Nations report, all is lost. “Any time you see a round number like 2.0 or 1.5 or 20 percent by 2020, that is a political number,” he said. “The reality is that every 10th of a degree matters.” There is no threshold after which it is not worth fighting.

climate change and extinction have been ongoing problems for as long as many of us can remember, feeling that they’re impossible to engage with right now is only natural.

But many of our problems are so thoroughly tangled up with one another that we may not need to fight them separately.

So fighting for racial or economic justice, or against voter suppression, still can mean fighting for the environment.

Not everything can be saved. But 2021 can be better than 2020, and 2031 can be much, much better than 2021, if we demand it.

U.S. government scientists announced that 2020 was one of the two hottest years in recorded history. The other hottest year was 2016: fittingly, the year that the United States elected Donald Trump president, a disaster for the environment as well as democratic norms

scientists sounding the alarm about high extinction rates, and in the years that followed, the idea that we are in the midst of one of the planet’s greatest mass-extinction events

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One very good reason to feel overwhelmed is that everything seems screwed up at once.  As a country, we’re facing climate change, the pandemic, racial injustice, the threat of dangerous fascist elements

Environmental destruction disproportionately harms people of color and lower-income people. And people of color are, on average, significantly more concerned about climate change than white people. A leading cause of inaction on climate change is the hoarding of power by some of the world’s wealthiest people, who profit from planetary destruction that they don’t have to deal with personally. They can simply crank up the air conditioner, pay more for the last remaining champagne and oysters, or fly to their New Zealand bunker, so they have no incentive to change unsustainable systems that they benefit from. When political power is more fairly distributed, the environment will benefit.

London never really caught a break after the Black Death. The plague resurfaced roughly every 10 years from 1348 to 1665—40 outbreaks in just over 300 years. And with each new plague epidemic, 20 percent of the men, women and children living in the British capital were killed.

By the early 1500s, England imposed the first laws to separate and isolate the sick. Homes stricken by plague were marked with a bale of hay strung to a pole outside. If you had infected family members, you had to carry a white pole when you went out in public. Cats and dogs were believed to carry the disease, so there was a wholesale massacre of hundreds of thousands of animals.

Smallpox—A European Disease Ravages the New World

The indigenous peoples of modern-day Mexico and the United States had zero natural immunity to smallpox and the virus cut them down by the tens of millions.

“[T]he annihilation of the smallpox, the most dreadful scourge of the human species, must be the final result of this practice,” wrote Jenner in 1801. And he was right. It took nearly two more centuries, but in 1980 the World Health Organization announced that smallpox had been completely eradicated from the face of the Earth.

In the early- to mid-19th century, cholera tore through England, killing tens of thousands. The prevailing scientific theory of the day said that the disease was spread by foul air known as a “miasma.” But a British doctor named John Snow suspected that the mysterious disease, which killed its victims within days of the first symptoms, lurked in London’s drinking water. Snow acted like a scientific Sherlock Holmes, investigating hospital records and morgue reports to track the precise locations of deadly outbreaks. He created a geographic chart of cholera deaths over a 10-day period and found a cluster of 500 fatal infections surrounding the Broad Street pump, a popular city well for drinking water.

While cholera has largely been eradicated in developed countries, it’s still a persistent killer in third-world countries lacking adequate sewage treatment and access to clean drinking water. 

“Pocock rejected the idea that politics or philosophy addressed the same problems over time — what justice meant for Aristotle did not mean the same for Hobbes or for Rousseau,”

“So explaining what political ideas meant in theory and in practice became the historian’s task.”

The Cambridge School attracted devotees across the world in departments of politics, history, philosophy, literature and language — scholars who were admonished to set aside any modern-day assumptions and prejudices they might hold when delving into the past.

“Readers, Christian or non-believing, who may find themselves involved in analyses of thought they consider obsolete or false, are asked to remember that they are studying the history of a time when such thinking was offered and read seriously,” he wrote.

Professor Pocock’s first book, “The Ancient Constitution and the Feudal Law,” made clear that he would not be a conventional historian. The book asked how people in the 17th century viewed their past, and he wasn’t satisfied with drawing on the go-to philosopher of the period, John Locke. As Colin Kidd wrote in The London Review of Books in 2008, the book “drove a bypass around Locke” and “concentrated instead on a set of debates among such obscure antiquaries as William Petyt, James Tyrrell, William Atwood and Robert Brady.”

“The Machiavellian Moment” cemented Professor Pocock’s reputation among historians, and it continued to grow from there. The first volume of “Barbarism and Religion” came out in 1999, when Professor Pocock was in his mid-70s. Volume 6 appeared in 2015. He also edited or co-edited “The Political Works of James Harrington” (1977), “Edmund Burke: Reflections on the Revolution in France” (1987) and “The Varieties of British Political Thought, 1500-1800” (1993), among other books.

“Pocock’s central contention,” the Oxford historian Keith Thomas wrote in The New York Review of Books in 1986, “is that a work of political thought can only be understood if the reader is aware of the contemporary linguistic constraints to which its author was subject, for these constraints prescribed both his subject matter and the way in which that subject matter was conceptualized.”

its application to the history of political ideas forms a great contrast to the assumptions of the 1950s, when it was widely thought that the close reading of a text by an analytic philosopher was sufficient to establish its meaning, even though the philosopher was quite innocent of any knowledge of the period in which the text was written or of the linguistic traditions within which its author operated.”

“Historians need to understand that the history of discourse is not a simple linear sequence in which new patterns overcome and replace the old,” he wrote in 1988 in a preface to a reissue of “Politics, Language and Time,” a 1971 essay collection, “but a complex dialogue in which these patterns persist in transforming one another.”

The Swahili Coast is a narrow strip of land that stretches some 2,000 miles along the Eastern African seaboard — from modern-day Mozambique, Comoros and Madagascar in the south, to Somalia in the north

In its medieval heyday, the region was home to hundreds of port towns, each ruled independently, but with a common religion (Islam), language (Kiswahili) and culture.

Many towns grew immensely wealthy thanks to a vibrant trading network with merchants who sailed across the Indian Ocean on the monsoon winds. Middle Eastern pottery, Asian cloths 0c 0c and other luxury goods came in. African gold, ivory and timber 0c 0c went out — along with a steady flow of enslaved people, who were shipped off and sold across the Arabian Peninsula and Persian Gulf. (Slave trading later took place between the Swahili coast and Europe as well.)

A unique cosmopolitan society emerged that blended African customs and beliefs with those of the foreign traders, some of whom stuck around and assimilated.

Islam, for example, arrived from the Middle East and became an integral part of the Swahili social fabric, but with coral-stone mosques built and decorated in a local, East African style

Or consider the Kiswahili language, which is Bantu in origin but borrows heavily from Indian and Middle Eastern tongues

The arrival of Europeans, beginning around 1500, followed by Omani sailors some 200 years later, changed the character of the region

over the past 40 years, archaeologists, linguists and historians have come to see Swahili society as predominantly homegrown — with outside elements adopted over time that had only a marginal impact.

That African-centric version of Swahili roots never sat well with the Swahili people themselves, though

They generally preferred their own origin story, one in which princes from present-day Iran (then known as Persia) sailed across the Indian Ocean, married local women and enmeshed themselves into East African society. Depending on the narrative source, that story dates to around 850 or 1000 — the same period during which genetic mixing was underway, according to the DNA analysis.

“It’s remarkably spot on,” said Mark Horton, an archaeologist at the Royal Agricultural University of England

“This oral tradition was always maligned,”

“Now, with this DNA study, we see there was some truth to it.”

The ancient DNA study is the largest of its kind from Africa, involving 135 skeletons dating to late-medieval and early-modern times, 80 of which have yielded analyzable DNA.

To figure out where these people came from, the researchers compared genetic signatures from the dug-up bones with cheek swabs or saliva samples taken from modern-day individuals living in Africa, the Middle East and around the world.

The burial-site DNA traced back to two primary sources: Africans and present-day Iranians. Smaller contributions came from South Asians and Arabs as well, with foreign DNA representing about half of the skeletons’ genealogy

“It’s surprising that the genetic signature is so strong

Gene sequences from tiny power factories inside the cell, known as mitochondria, were overwhelmingly African in origin. Since children inherit these bits of DNA only from their mothers, the researchers inferred that the maternal forbearers of the Swahili people were mostly of African descent.

By comparison, the Y chromosome, passed from father to son, was chock-full of Asian DNA that the researchers found was common in modern-day Iran. So, a large fraction of Swahili ancestry presumably came from Persian men

Dr. Reich initially assumed that conquering men settled the region by force, displacing the local males in the process. “My hypothesis was that this was a genetic signature of inequality and exploitation,”

hat turned out to be a “naïve expectation,” Dr. Reich said, because “it didn’t take into account the cultural context in this particular case.”

In East Africa, Persian customs never came to dominate. Instead, most foreign influences — language, architecture, fashion, arts — were incorporated into a way of life that remained predominantly African in character, with social strictures, kinship systems and agricultural practices that reflected Indigenous traditions.

“Swahili was an absorbing society,” said Adria LaViolette, an archaeologist at the University of Virginia who has worked on the East African coast for over 35 years. Even as the Persians who arrived influenced the culture, “they became Swahili,”

One major caveat to the study: Nearly all the bones and teeth came from ornamental tombs that were located near grand mosques, sites where only the upper class would have been laid to rest.

the results might not be representative of the general populace.

Protocols for disinterring, sampling and reburying human remains were established in consultation with local religious leaders and community stakeholders. Under Islamic law, exhumations are permitted if they serve a public interest, including that of determining ancestry,