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Presidents Harry S Truman, John F. Kennedy and Lyndon B. Johnson rank first through third.

Presidents George H.W. Bush, Jimmy Carter and George W. Bush make up the bottom three.

President Ronald Reagan is No. 8, just one slot above President Obama.

there are six Republicans and six Democrats, so if we take the average for Democratic and Republican presidents we can make a head-to-head party comparison

The Democratic presidents scored substantially higher than the Republican presidents, with a score of 26.95. Republican presidents scored -26.95.

Five out of six Democrats reduced the national debt as a percentage of GDP, while four out of six Republicans raised it. The story is similar on budget deficits, with five of the top six performances recorded by Democrats and four of the bottom five recorded by Republicans.

With respect to GDP growth, three of the top four performers were Democrats and four of the bottom five were Republicans. In reducing the poverty rate, the top three were Democrats and two of the bottom three were Republicans. The Democrats also had a better record on employment.

Republicans had better records on reducing inflation, achieving four of the top five performances, while Democrats had four of the bottom five showings. Republicans also did well in lowering tax revenue as a percentage of GDP, claiming the top five spots.

what does this tell us about Obama? When all of the indicators are combined, he ranks ninth out of 12, one position below Reagan but above Bush 41, Carter and Bush 43. Obama is also well below the midpoint that falls between Clinton and Nixon. For Republicans who view Reagan as an economic miracle- maker and Obama as, well, something less than that, it might come as a shock that Obama falls next in line in economic performance.

Lined up against his contemporaries after 1977, Obama ranks third out of six.

The fundamental geographic division in American politics has traditionally been a sectional conflict setting the North against the South. The idioms of "red states" and "blue states" caught on widely after the 2000 presidential election because they could be applied to a regional divide—blue North, red South—that was already presumed to reflect the main axis of political debate and competition. But the partisan difference between large-metro and rural residents has now become much larger than the gap between northerners and southerners.

I call this widening gap between the partisan loyalties of urban and rural America “the density divide.” Hopkins is clearly correct that urban vs. rural has eclipsed North vs. South as the geographic embodiment of our partisan divisions. As the old adage goes, a chart speaks a thousand white papers.

I suspect that battle between North and South lives on both culturally and geographically. The North has drifted out of the countryside and concentrated itself into our cities. At the same time, America’s rural and exurban counties have slowly become more and more homogenously Southern. The South has risen again … in rural Maine?

One of the puzzles of the 2016 election, and the catastrophe of the Trump presidency, is how populist white nationalism finally prevailed at a time when Americans, taken altogether, were less racist than ever

My hunch is that rural white culture, which was once regionally varied and distinctive, became more uniform by becoming increasingly Southern. I call this the Southernification thesis.

In the Density Divide, I argued that the key to answering “Why did white ethnonationalism finally work to win the GOP nomination and then the White House when it didn’t even get close to working for Pat Buchanan or Ron Paul?” was that residential self-selection on ethnicity, personality, and education had made lower Density parts of the country progressively more homogenously ethnocentric and socially conservative, which finally made it possible to unify and organize rural and exurban whites as a single constituency.

I think it’s an incomplete explanation without something like the Southernification thesis. Before it could be successfully organized politically, America’s increasingly ethnocentric non-urban white population needed to be consolidated first through the adoption of a relatively uniform ethnocentric white culture.

When I was a kid, the Atlanta Bravesþff somehow became “America’s Team.” Could it be that the media mogul who married Hanoi Jane took the critical first step in bringing non-urban white America together by beaming sanitized Southern culture into living rooms everywhere?

the usual stories of utility maximization and optimal pricing “can’t explain the rise in the whole world’s (absolute) advantage from $3 to $30 a day, not to speak of $137 a day.”

McCloskey’s explanation is that people changed the way they thought, wrote and spoke about economic activity. “In the eighteenth and nineteenth centuries,” she writes, “a great shift occurred in what Alexis de Tocqueville called ‘habits of the mind’ -- or more exactly, habits of the lip. People stopped sneering at market innovativeness and other bourgeois virtues.” As attitudes changed, so did behavior, leading to more than two centuries of constant innovation and rising living standards.

Most of “Bourgeois Dignity” is devoted to knocking down alternative explanations for the sudden and enormous escalation in living standards. In particular, McCloskey draws on the last half-century of economic-history scholarship to debunk what most people outside the field assume was the critical ingredient: savings and wealth accumulation. We might call this explanation “capital-ism.” Whether derived from Karl Marx, Max Weber, Karl Polyani, or, in a more-recent incarnation, Fernand Braudel, she argues, the emphasis on capital simply gets the facts wrong. It is empirically false.

savings rate of at least 12 percent, compared with no more than 10 percent to 20 percent in modern industrial economies. And, contrary to Weber’s story about a new Protestant Ethic, savings rates were roughly the same in Catholic and Protestant countries or, for that matter, in China.

Besides, as economic historians discovered in the 1960s, the economic takeoff didn’t actually require large amounts of capital. Early cotton mills, for instance, were relatively cheap to set up. “The source of the industrial investment required was short-term loans from merchants for inventories and longer- term loans from relative

What was different, she maintains, is how people thought about new ideas. Creative destruction became not only accepted but also encouraged, as did individual enterprise. “What

ade us rich,” she writes, “was a new rhetoric that was favorable to unbounded innovation, imaginatio

ness, persuasion, originality, with individual rewards often paid in a coin of honor or thankfuln

McCloskey’s book is not only a useful survey of how scholars answer the biggest question in economics: What causes growth? It is also a timely reminder that prosperity depends on more than effort or resources or infrastructure or good laws. Attitudes matter, too. You don’t build a wealthy society by deriding bourgeois enterprise -- or the people who take pride in it.

Other countries have different goals. The South Korean government announced a plan to install 1 gigabit per second of symmetric fiber data access in every home by 2012. Hong Kong, Japan and the Netherlands are heading in the same direction. Australia plans to get 93 percent of homes and businesses connected to fiber. In the U.K., a 300 Mbps fiber-to-the-home service will be offered on a wholesale basis.

In a sense, the FCC adopted the cable companies’ business plan as the country’s goal. The commission’s embrace of asymmetric access -- slower upload than download speeds -- also serves the carriers’ interests: Only symmetric connections would allow every American to do business from home rather than use the Internet simply for high-priced entertainmen

The first step is to decide what the goal of telecommunications policy should be. Network access providers -- and the FCC -- are stuck on the idea that not all Americans need high-speed Internet access. The FCC’s National Broadband Plan of March 2010 suggested that the minimum appropriate speed for every American household by 2020 should be 4 megabits per second for downloads and 1 Mbps for uploads. These speeds are enough, the FCC said, to reliably send and receive e-mail, download Web pages and use simple video conferencing.

Think of it this way: With a dialup connection, backing up 5 gigabytes of data (now the standard free plan offered by many storage companies) would take 20 days. Over a standard (3G) wireless connection, it would take two and a half days. Over a 4G connection it would be more than seven hours, and over a cable DOCSIS 3.0 connection, an hour and a half. With a gigabit fiber-to-the-home connection, it can be done in less than a minute.

If the U.S. had a fully fiber-based network, Hollywood blockbusters could be downloaded in 12 seconds, video conferencing would become routine, and every household could see 3D and Super HD images. Americans could be connected instantly to their co-workers, their families, their teachers and their health-care monitors. To make this happen, though, the U.S. needs to move to a utility model, based on the assumption that all Americans require fiber-optic Internet access at reasonable prices. How much would it cost to bring fiber to the homes of all Americans? Corning Inc. (GLW), the American glass manufacturer, and others have estimated that it would take between $50 billion and $90 billion.

The Internet has taken the place of the telephone as the world’s basic, general-purpose, two-way communication medium. All Americans need high-speed access, just as they need clean water, clean air and electricity. But they have allowed a naive belief in the power and beneficence of the free market to cloud their vision. As things stand, the U.S. has the worst of both worlds: no competition and no regulation.

it turns out that the way we move largely determines the way we live.

gadgets cumulatively contribute only a fraction of what we save by living in a walkable neighborhood. It turns out that trading all of your incandescent lightbulbs for energy savers conserves as much carbon per year as living in a walkable neighborhood does each week.

“gizmo green”; the obsession with “sustainable” products that often have a statistically insignificant impact on the carbon footprint when compared to our location. And, as already suggested, our location’s greatest impact on our carbon footprint comes from how much it makes us drive.

study made it clear that, while every factor counts, none counts more than walkability. Specifically, it showed how, in drivable locations, transportation energy use consistently tops household energy use, in some cases by more than 2.4 to 1. As a result, the most green home (with Prius) in sprawl still loses out to the least green home in a walkable neighborhood.

because it’s better than nothing, LEED — like the Prius — is a get-out-of-jail-free card that allows us to avoid thinking more deeply about our larger footprint. For most organizations and agencies, it is enough. Unfortunately, as the transportation planner Dan Malouff puts it, “LEED architecture without good urban design is like cutting down the rainforest using hybrid-powered bulldozers.”

10 to 20 units per acre is the density at which drivable suburbanism transitions into walkable urbanism.

“We are a destructive species, and if you love nature, stay away from it. The best means of protecting the environment is to

The average New Yorker consumes roughly one-third the electricity of the average Dallas resident, and ultimately generates less than one-third the greenhouse gases of the average American.

New York is our densest big city and, not coincidentally, the one with the best transit service. All the other subway stations in America put together would not outnumber the 468 stops of the MTA. In terms of resource efficiency, it’s the best we’ve got.

New York consumes half the gasoline of Atlanta (326 versus 782 gallons per person per year). But Toronto cuts that number in half, as does Sydney — and most European cities use only half as much as those places. Cut Europe’s number in half, and you end up with Hong Kong

Paris is one place that has determined that its future depends on reducing its auto dependence. The city has recently decided to create 25 miles of dedicated busways, introduced 20,000 shared city bikes in 1,450 locations, and committed to removing 55,000 parking spaces from the city every year for the next 20 years. These changes sound pretty radical, but they are supported by 80 percent of the population.

increasing density from two units per acre to 20 units per acre resulted in about the same savings as the increase from 20 to 200.

the American anti-urban ethos remained intact as everything else changed. The desire to be isolated in nature, adopted en masse, led to the quantities and qualities we now call “sprawl,” which somehow mostly manages to combine the traffic congestion of the city with the intellectual culture of the countryside.

most communities with these densities are also organized as traditional mixed-use, pedestrian-friendly neighborhoods, the sort of accommodating environment that entices people out of their cars. Everything above that is icing on the cake.

unless we hit a national crisis of unprecedented severity, it is hard to imagine any argument framed in the language of sustainability causing many people to modify their behavior. So what will?

The gold standard of quality-of-life rankings is the Mercer Survey, which carefully compares global cities in the 10 categories of political stability, economics, social quality, health and sanitation, education, public services, recreation, consumer goods, housing, and climate.

the top 10 cities always seem to include a bunch of places where they speak German (Vienna, Zurich, Dusseldorf, etc.), along with Vancouver, Auckland, and Sydney. These are all places with compact settlement patterns, good transit, and principally walkable neighborhoods. Indeed, there isn’t a single auto-oriented city in the top 50. The highest-rated American cities in 2010, which don’t appear until No. 31, are Honolulu, San Francisco, Boston, Chicago, Washington, New York, and Seattle.

Our cities, which are twice as efficient as our suburbs, burn twice the fuel of these European, Canadian, and Aussie/Kiwi places. Yet the quality of life in these foreign cities is deemed higher than ours by a long shot.

if we pollute so much because we are throwing away our time, money, and lives on the highway, then both problems would seem to share a single solution, and that solution is to make our cities more walkable. Doing so is not easy, but it can be done, it has been done,

Smil’s “prime movers,” which he defines as “energy converters able to produce kinetic (mechanical) energy into forms suitable for human use.” For most of the time that there have been humans on earth, the best prime movers have been people

while Smil agrees with pretty much everyone else that the next big energy transition is from nonrenewable to renewable resources, he is cautious about the timing. At one level, the change is plainly inevitable.

Things really kicked off with the invention of the steam engine in the 1700s—the first prime mover powered by fuels (100,000W in 1800; 3,000,000W in 1900). This was followed by the steam turbine (75,000W in 1890; 25,000,000W in 1914). The prime-mover revolution is rounded out by the internal-combustion engine in the later half of the 1800s and the gas turbine in the 1930s

Smil is concerned with the series of transitions that have occurred throughout human history, both in terms of resources and prime movers. These transitions are somewhat interrelated, but not completely. For example, you can run a steam turbine off of wood, coal, or nuclear power so a transition between those resources does not necessitate a change in prime movers. On the other hand, you can’t feed an internal-combustion engine with wind or wood. At the moment, all of our best prime movers rely heavily on fossil fuels.

how prime movers have increased in power over the course of history. Remember that orange lifted to a counter? If you expend that effort over a second, that's 1W (a watt) of work. Smil calculates that the average healthy human can sustain 60W–100W of work throughout a working day. At some point in prehistory, people started yoking domesticated animals (250W–800W depending on the breed). Then came sails, then a few thousand years later, waterwheels (2,000W–4,000W in medieval times) and then a thousand years after that, windmills (1,000W–10,0000W in 1900).

The barriers to total conversion—much like the problems that plague our energy infrastructure—are a funny mixture of policy, technology, infrastructure, and physics

Where he does differ is in his opinion about how quickly it can happen. Where Gore calls for a complete conversion to renewables in 10 years, Smil thinks the transition will take generations.

For example, the possibility that nuclear power might take up any of the load in the U.S. seems extremely low, given that no new plants have been built since the 1970s. That’s not a physics problem, that’s a policy problem.

As far as converting to wind and solar, Smil sees much bigger technological and infrastructural hurdles. A switch to renewables means a transition in terms of both resources and prime movers.

The character of renewable resources is fundamentally different from that of fossil fuels. Where fuels are highly dense stores of energy and relatively easy to reliably transport, the renewables are characterized by the highly fickle ebbs and flows of nature. Some days are sunny, others have clouds.

Energy density is sometimes used to discuss the capacity of volumes of batteries and fuel. Smil is interested instead in measuring energy per unit of the earth’s surface. He uses the figure as a means to try to compare the various means of producing energy and the demands for using it.

to measure the energy density of coal, you look at how much energy you get from burning coal and divide that by how much of the earth’s surface needs to be given over to coal production to get it.

Because the best way of mitigating the irregularity in how they generate power is to create interconnected grids, an energy regime based on wind and solar needs to lay a lot of power lines through a lot of jurisdictions and permitting regimes. Physics meets infrastructure, and policy. Renewables are simply more diffuse.

“Mass adoption of renewable energies would thus necessitate a fundamental reshaping of modern energy infrastructures,” Smil writes. We'd go from harvesting energy from concentrated sources and diffusing it outwards, to gathering energy from diffuse sources and concentrating it inwards towards relatively few centers. This is, fundamentally, a very different way of organizing how we use land.

This is not impossible, and in the long run it is probably inevitable. But we underestimate the effort required and changes that will be necessary at our peril.

The switch from wood to coal ushered in industrialization which completely upended social-structures and human relationships all over the world. The rise of oil transformed geo-politics, turning some countries into energy superpowers overnight. No one knows how deeply our society might be transformed by the transition to renewables. Or whether we'll be able to do it fast enough.

New York City and its suburban counties — Nassau, Suffolk, Westchester and Rockland — are responsible for 93% of the statewide case count

Covid-19 spreads most easily when people are packed together — in churches or cruise ships, in outdoor events like concerts or Mardi Gras, or perhaps in small apartments with multiple roommates or large families. New York's population density, about 27,000 people per square mile, is easily the highest in the country, though it's nowhere near the top for cities across the globe. Many cities — in Asia, for example — have a density of nearly 40,000 people per square mile.

Maybe it's because so much testing is being done in New York. If you test more, you find more, and if you find more, you test even more.

The high number of cases and rates likely do derive in some modest amount to each explanation above — plus the fact that the epidemic has been in New York City a week or two longer than many other places. A more mature epidemic is always a larger epidemic.

Still, a mortality rate of about 6% is quite high, even though most countries, particularly in western Europe, have seen mortality rates rise as the pandemic drags on.

Hopefully, the Covid-19 pandemic will force us to reckon honestly with the many shortfalls that have been exposed and build a fair, forward-thinking approach that allows doctors and nurses to care for people in need. Failure to do this will only further darken the memory of those who have died and the hearts of those who remain.

Cooper's lawsuit says she was rejected from competing even though she provided documentation that her testosterone levels had remained under the IOC's accepted limit for two years.

"USAPL denied Ms. Cooper's eligibility to compete because she is a transgender woman, withdrew her competition card because she is a transgender woman, and then went on to adopt a categorical ban on participation by transgender women athletes at USAPL competitions,"

"USA Powerlifting is not a fit for every athlete and for every medical condition or situation," the organization's Transgender Participation Policy states. "Simply, not all powerlifters are eligible to compete in USA Powerlifting."

Cooper said Tuesday that she began lifting in 2018 and said training her body for the sport empowered her in ways she couldn't previously have imagined

"Men naturally have a larger bone structure, higher bone density, stronger connective tissue and higher muscle density than women," it says. "These traits, even with reduced levels of testosterone do not go away. While MTF [male-to-female] may be weaker and less muscle than they once were, the biological benefits given them at birth still remain over than of a female."

The policy says USA Powerlifting is a "sports organization with rules and policies" that "apply to everyone to provide a level playing field."

"As a trans person, this took on additional meaning, because our bodies are so politicized and demonized regularly," she said.

"There are a myriad of factors that help determine someone's success in competition," Erin Maye Quade, advocacy director at Gender Justice, said Tuesday. "Anti-trans propaganda's fixation on a single factor lays bare their plot to perpetuate rigid ideas about how women are supposed to look and sound and act."

"I grew up pursuing Olympic dreams, and that was taken away from me in the sport of powerlifting," Cooper said. "I don't want anyone to experience what I and other trans athletes have and continue to experience."

Contrary to conventional wisdom, urban population density does not seem to have been the primary factor in the virus’s spread — note how Asian megacities like Hong Kong and Seoul combated the virus successfully, while many American rural areas suffered major outbreaks.

But in New York and other American cities, overcrowding within residences, caused by a lack of affordable housing, did exacerbate the contagion. So let’s fix that: In addition to loosening our antiquated zoning rules, perhaps vacant office buildings and retail space can be turned into apartments, lowering the cost of housing.

This is also our chance to remake crumbling urban infrastructure — to create more engaging outdoor public spaces and to radically improve public transportation.

Then there is climate change. Think of the coronavirus as a trailer for the horror flick of natural disasters to come. We have a chance to fortify urban space against future outbreaks of disease as well as the coming calamities caused by the changing weather — we can even do both at the same time

The coronavirus does not have to kill cities — just our old idea of what cities were, how they worked, and who they were for.

Despite their economic and cultural importance, cities in the United States are often marginalized in politics and, more deeply, in our picture of how America should work. About 80 percent of Americans live in urban areas, but most say they’d rather live somewhere else.

Democrats depend on big cities and their surrounding suburbs for the bulk of their voters, but when was the last time you heard a national Democratic politician make a forceful case for the beauty, creativity and importance of cities

“Cities were once the most helpless and devastated victims of disease, but they became great disease conquerors,” wrote Jane Jacobs, the great urbanist, in “The Death And Life of Great American Cities.”

“All the apparatus of surgery, hygiene, microbiology, chemistry, telecommunications, public health measures, teaching and research hospitals, ambulances and the like, which people not only in cities but also outside them depend upon for the unending war against premature mortality, are fundamentally products of big cities and would be inconceivable without big cities.”

“So far we’re seeing basic agreement with our best model of the universe, but we’re also seeing some potentially interesting differences that could indicate that dark energy is evolving with time,”

When the scientists combined their map with other cosmological data, they were surprised to find that it did not quite agree with the otherwise reliable standard model of the universe, which assumes that dark energy is constant and unchanging. A varying dark energy fit the data points better.

“It’s certainly more than a curiosity,” Dr. Palanque-Delabrouille said. “I would call it a hint. Yeah, it’s not yet evidence, but it’s interesting.”

But this version of dark energy is merely the simplest one. “With DESI we now have achieved a precision that allows us to go beyond that simple model,” Dr. Palanque-Delabrouille said, “to see if the density of dark energy is constant over time, or if it has some fluctuations and evolution with time.”

“While combining data sets is tricky, and these are early results from DESI, the possible evidence that dark energy is not constant is the best news I have heard since cosmic acceleration was firmly established 20-plus years ago.”

praised the new survey as “superb data.” The results, she said, “open the potential for a new window into understanding dark energy, the dominant component of the universe, which remains the biggest mystery in cosmology. Pretty exciting.”

what if dark energy were not constant as the cosmological model assumed?

At issue is a parameter called w, which is a measure of the density, or vehemence, of the dark energy. In Einstein’s version of dark energy, this number remains constant, with a value of –1, throughout the life of the universe. Cosmologists have been using this value in their models for the past 25 years.

Dark energy took its place in the standard model of the universe known as L.C.D.M., composed of 70 percent dark energy (Lambda), 25 percent cold dark matter (an assortment of slow-moving exotic particles) and 5 percent atomic matter. So far that model has been bruised but not broken by the new James Webb Space Telescope

As a measure of distance, the researchers used bumps in the cosmic distribution of galaxies, known as baryon acoustic oscillations. These bumps were imprinted on the cosmos by sound waves in the hot plasma that filled the universe when it was just 380,000 years old. Back then, the bumps were a half-million light-years across. Now, 13.5 billion years later, the universe has expanded a thousandfold, and the bumps — which are now 500 million light-years across — serve as convenient cosmic measuring sticks.

The DESI scientists divided the past 11 billion years of cosmic history into seven spans of time. (The universe is 13.8 billion years old.) For each, they measured the size of these bumps and how fast the galaxies in them were speeding away from us and from each other.

When the researchers put it all together, they found that the usual assumption — a constant dark energy — didn’t work to describe the expansion of the universe. Galaxies in the three most recent epochs appeared closer than they should have been, suggesting that dark energy could be evolving with time.

Dr. Riess of Johns Hopkins, who had an early look at the DESI results, noted that the “hint,” if validated, could pull the rug out from other cosmological measurements, such as the age or size of the universe. “This result is very interesting and we should take it seriously,” he wrote in his email. “Otherwise why else do we do these experiments?”

The Least Affordable Neighborhood in the U.S.? From the report: "In the Philadelphia region, moderate-income households are faced with average housing and transportation costs exceeding 90 percent of their income in some neighborhoods."

The Price of Density: Housing in Houston isn't so bad -- it's the 8th most affordable large city to own a home in. But the same thing that helps make it an affordable place to own a home (lots of space!) also raises its commuting costs. Factor in transportation, and it's the 8th least affordable large city to live.

dense expensive cities like San Francisco, Boston and New York are considerably more affordable when you add in transportation costs because of their superior public transit.

Nationwide, Housing Grew 2X as Fast as Income: Combined H&T expenses average $30,296 for a median-income household, according to the report. But they're growing much faster than median household income.

the mouth feel of soda and many other food items, especially those high in fat, is second only to the bliss point in its ability to predict how much craving a product will induce.

He organized focus-group sessions with the people most responsible for buying bologna — mothers — and as they talked, he realized the most pressing issue for them was time. Working moms strove to provide healthful food, of course, but they spoke with real passion and at length about the morning crush, that nightmarish dash to get breakfast on the table and lunch packed and kids out the door.

as the focus swung toward kids, Saturday-morning cartoons started carrying an ad that offered a different message: “All day, you gotta do what they say,” the ads said. “But lunchtime is all yours.”

When it came to Lunchables, they did try to add more healthful ingredients. Back at the start, Drane experimented with fresh carrots but quickly gave up on that, since fresh components didn’t work within the constraints of the processed-food system, which typically required weeks or months of transport and storage before the food arrived at the grocery store. Later, a low-fat version of the trays was developed, using meats and cheese and crackers that were formulated with less fat, but it tasted inferior, sold poorly and was quickly scrapped.

One of the company’s responses to criticism is that kids don’t eat the Lunchables every day — on top of which, when it came to trying to feed them more healthful foods, kids themselves were unreliable. When their parents packed fresh carrots, apples and water, they couldn’t be trusted to eat them. Once in school, they often trashed the healthful stuff in their brown bags to get right to the sweets.

This idea — that kids are in control — would become a key concept in the evolving marketing campaigns for the trays. In what would prove to be their greatest achievement of all, the Lunchables team would delve into adolescent psychology to discover that it wasn’t the food in the trays that excited the kids; it was the feeling of power it brought to their lives.

The prevailing attitude among the company’s food managers — through the 1990s, at least, before obesity became a more pressing concern — was one of supply and demand. “People could point to these things and say, ‘They’ve got too much sugar, they’ve got too much salt,’ ” Bible said. “Well, that’s what the consumer wants, and we’re not putting a gun to their head to eat it. That’s what they want. If we give them less, they’ll buy less, and the competitor will get our market. So you’re sort of trapped.”

at last count, including sales in Britain, they were approaching the $1 billion mark. Lunchables was more than a hit; it was now its own category

he holds the entire industry accountable. “What do University of Wisconsin M.B.A.’s learn about how to succeed in marketing?” his presentation to the med students asks. “Discover what consumers want to buy and give it to them with both barrels. Sell more, keep your job! How do marketers often translate these ‘rules’ into action on food? Our limbic brains love sugar, fat, salt. . . . So formulate products to deliver these. Perhaps add low-cost ingredients to boost profit margins. Then ‘supersize’ to sell more. . . . And advertise/promote to lock in ‘heavy users.’ Plenty of guilt to go around here!”

men in the eastern part of Finland had the highest rate of fatal cardiovascular disease in the world. Research showed that this plague was not just a quirk of genetics or a result of a sedentary lifestyle — it was also owing to processed foods. So when Finnish authorities moved to address the problem, they went right after the manufacturers. (The Finnish response worked. Every grocery item that was heavy in salt would come to be marked prominently with the warning “High Salt Content.” By 2007, Finland’s per capita consumption of salt had dropped by a third, and this shift — along with improved medical care — was accompanied by a 75 percent to 80 percent decline in the number of deaths from strokes and heart disease.)

I tracked Lin down in Irvine, Calif., where we spent several days going through the internal company memos, strategy papers and handwritten notes he had kept. The documents were evidence of the concern that Lin had for consumers and of the company’s intent on using science not to address the health concerns but to thwart them. While at Frito-Lay, Lin and other company scientists spoke openly about the country’s excessive consumption of sodium and the fact that, as Lin said to me on more than one occasion, “people get addicted to salt

the marketing team was joined by Dwight Riskey, an expert on cravings who had been a fellow at the Monell Chemical Senses Center in Philadelphia, where he was part of a team of scientists that found that people could beat their salt habits simply by refraining from salty foods long enough for their taste buds to return to a normal level of sensitivity. He had also done work on the bliss point, showing how a product’s allure is contextual, shaped partly by the other foods a person is eating, and that it changes as people age. This seemed to help explain why Frito-Lay was having so much trouble selling new snacks. The largest single block of customers, the baby boomers, had begun hitting middle age. According to the research, this suggested that their liking for salty snacks — both in the concentration of salt and how much they ate — would be tapering off.

Riskey realized that he and his colleagues had been misreading things all along. They had been measuring the snacking habits of different age groups and were seeing what they expected to see, that older consumers ate less than those in their 20s. But what they weren’t measuring, Riskey realized, is how those snacking habits of the boomers compared to themselves when they were in their 20s. When he called up a new set of sales data and performed what’s called a cohort study, following a single group over time, a far more encouraging picture — for Frito-Lay, anyway — emerged. The baby boomers were not eating fewer salty snacks as they aged. “In fact, as those people aged, their consumption of all those segments — the cookies, the crackers, the candy, the chips — was going up,” Riskey said. “They were not only eating what they ate when they were younger, they were eating more of it.” In fact, everyone in the country, on average, was eating more salty snacks than they used to. The rate of consumption was edging up about one-third of a pound every year, with the average intake of snacks like chips and cheese crackers pushing past 12 pounds a year

Riskey had a theory about what caused this surge: Eating real meals had become a thing of the past.

“We looked at this behavior, and said, ‘Oh, my gosh, people were skipping meals right and left,’ ” Riskey told me. “It was amazing.” This led to the next realization, that baby boomers did not represent “a category that is mature, with no growth. This is a category that has huge growth potential.”

The food technicians stopped worrying about inventing new products and instead embraced the industry’s most reliable method for getting consumers to buy more: the line extension.

He zeroed right in on the Cheetos. “This,” Witherly said, “is one of the most marvelously constructed foods on the planet, in terms of pure pleasure.” He ticked off a dozen attributes of the Cheetos that make the brain say more. But the one he focused on most was the puff’s uncanny ability to melt in the mouth. “It’s called vanishing caloric density,” Witherly said. “If something melts down quickly, your brain thinks that there’s no calories in it . . . you can just keep eating it forever.”

Frito-Lay acquired Stacy’s Pita Chip Company, which was started by a Massachusetts couple who made food-cart sandwiches and started serving pita chips to their customers in the mid-1990s. In Frito-Lay’s hands, the pita chips averaged 270 milligrams of sodium — nearly one-fifth a whole day’s recommended maximum for most American adults — and were a huge hit among boomers.

There’s a paradox at work here. On the one hand, reduction of sodium in snack foods is commendable. On the other, these changes may well result in consumers eating more. “The big thing that will happen here is removing the barriers for boomers and giving them permission to snack,” Carey said. The prospects for lower-salt snacks were so amazing, he added, that the company had set its sights on using the designer salt to conquer the toughest market of all for snacks: schools

The company’s chips, he wrote, were not selling as well as they could for one simple reason: “While people like and enjoy potato chips, they feel guilty about liking them. . . . Unconsciously, people expect to be punished for ‘letting themselves go’ and enjoying them.” Dichter listed seven “fears and resistances” to the chips: “You can’t stop eating them; they’re fattening; they’re not good for you; they’re greasy and messy to eat; they’re too expensive; it’s hard to store the leftovers; and they’re bad for children.” He spent the rest of his memo laying out his prescriptions, which in time would become widely used not just by Frito-Lay but also by the entire industry.

Dichter advised Frito-Lay to move its chips out of the realm of between-meals snacking and turn them into an ever-present item in the American diet. “The increased use of potato chips and other Lay’s products as a part of the regular fare served by restaurants and sandwich bars should be encouraged in a concentrated way,”

the largest weight-inducing food was the potato chip. The coating of salt, the fat content that rewards the brain with instant feelings of pleasure, the sugar that exists not as an additive but in the starch of the potato itself — all of this combines to make it the perfect addictive food. “The starch is readily absorbed,” Eric Rimm, an associate professor of epidemiology and nutrition at the Harvard School of Public Health and one of the study’s authors, told me. “More quickly even than a similar amount of sugar. The starch, in turn, causes the glucose levels in the blood to spike” — which can result in a craving for more.

If Americans snacked only occasionally, and in small amounts, this would not present the enormous problem that it does. But because so much money and effort has been invested over decades in engineering and then relentlessly selling these products, the effects are seemingly impossible to unwind.

Todd Putman, who worked at Coca-Cola from 1997 to 2001, said the goal became much larger than merely beating the rival brands; Coca-Cola strove to outsell every other thing people drank, including milk and water. The marketing division’s efforts boiled down to one question, Putman said: “How can we drive more ounces into more bodies more often?”

they were civilians — mostly women and children — fleeing shelling and air strikes on other parts of the city.

refugees were filling up apartment buildings long abandoned because of the war

Observatory chief Rami Abdurrahman said he predicts death tolls will spiral in east Aleppo as the internal displacement creates more residential density

It blamed the government for the strikes.

more than 50,000 out of an estimated quarter-million inhabitants have been displaced by attacks on rebel-held eastern Aleppo

0,000 people have fled.

Many boomers are now empty nesters and approaching retirement. Generally this means that they will downsize their housing in the near future. Boomers want to live in a walkable urban downtown, a suburban town center or a small town

Many drivable-fringe house prices are now below replacement value, meaning the land under the house has no value and the sticks and bricks are worth less than they would cost to replace. This means there is no financial incentive to maintain the house; the next dollar invested will not be recouped upon resale. Many of these houses will be converted to rentals, which are rarely as well maintained as owner-occupied housing. Add the fact that the houses were built with cheap materials and methods to begin with, and you see why many fringe suburbs are turning into slums, with abandoned housing and rising crime.

The good news is that there is great pent-up demand for walkable, centrally located neighborhoods

The cities and inner-ring suburbs that will be the foundation of the recovery require significant investment at a time of government retrenchment. Bus and light-rail systems, bike lanes and pedestrian improvements — what traffic engineers dismissively call “alternative transportation” — are vital.

"We've seen a revival of religion in the world," Fukuyama says, noting that religion has played a central role in the historical development of political institutions as well. Early human sociability was limited to face-to-face interactions within close-knit kin groups, and trust didn't extend beyond a few dozen relatives. Large-scale cooperation didn't become possible until the development of religious beliefs, which allowed trust to transcend kin. And that paved the way for the big faith communities—Christianity, Judaism, Islam, Hinduism—capable of uniting tens of millions of people in collective action.

"There is no clearer illustration of the importance of ideas to politics than the emergence of an Arab state under the Prophet Muhammad," Fukuyama writes. "The Arab tribes played an utterly marginal role in world history until that point; it was only Muhammad's charismatic authority that allowed them to unify and project their power throughout the Middle East and North Africa."

Fukuyama's portrayal of religion as a unifying force in history will irk some atheists, for whom religion is at all times a source of intolerance, conflict, and violence.

religion's role in the contemporary world is more problematic. Pluralistic societies require religions to coexist in proximity. As a result, he says, "integration today has to be based on shared political values, not deep, religiously rooted cultural beliefs."

Explosives experts said it was feasible the device shown in the photo could bring down a plane, depending on where it was located and the density of explosives in the soft drink can. The most vulnerable locations include the fuel line, the cockpit or anywhere close to the fuselage skin.

Experts added that the photo could also provide a key clue in tracking Islamic State as the detonator pictured was a commercial one, which could be traced back to its manufacturer.

State Department spokesman John Kirby said on Wednesday the U.S. government was not in a position to confirm "the veracity" of the magazine's claim.

activity is likely the reason," he said, referring to the crash.

"We do believe that terrorist

also published a photo of what it said were passports belonging to dead Russians "obtained by the mujahideen". It was not immediately possible to verify the authenticity of the published photos.The group, which has seized large swathes of Syria and Iraq, said it had exploited a loophole at Sharm al-Sheikh airport, where the plane originated, in order to smuggle a bomb on board.

The airport is widely used by budget and charter airlines to fly tourists to the nearby resorts on the Sinai coast.

said it had initially planned to bring down a plane belonging to a country participating in the U.S.-led coalition bombing it in Syria and Iraq, but it changed course after Moscow started its own air strikes campaign in Syria.

Islamic State's Egyptian branch, Sinai Province, claimed responsibility for the attack the day it happened but Egyptian officials were quick to dismiss talk of a bomb as premature.

The Maya culture was known for its sophisticated approach to agriculture, arts and astronomy. The peak era for the civilization, which some archaeologists refer to as the Classic Period, is generally considered to have lasted from around A.D. 250 to 900.

The total population at that time was once estimated to be a few million, said Diane Davies, an archaeologist and Maya specialist based in the United Kingdom. But in light of the new lidar data, she said it could now be closer to 10 million.

“To have such a large number of people living at such a high level for such a long period of time, it really proves the fact that these people were highly developed, and also quite environmentally conscientious,” she said.

So what technologies make sense in public transit? Efficient transit networks are made of many technologies, each the right one for its own situation. Rail is for high-capacity markets, where you need to move hundreds of people per vehicle. Ferries and aerial gondolas overcome certain obstacles. But everywhere else, the bus is the thing that’s easiest to make abundant. Because labor is the main limit on their quantity, they can be much more abundant after full automation.

Fixed public transit deploys large vehicles flowing along a set path, and riders gathering at stops to use them. That way, the vehicles can follow a fairly straight line, and they don’t need to stop once for every customer. That is what makes them worth walking to get to. It is one of the best ideas in the history of transportation

And walking is key to it. Out in low-density suburbs, residents can also drive to fixed-transit stops. But in the dense city, there’s no room for that. The microtransit promise of “service to your door” is a promise to abolish walking, and yet walking is the essence of how people share precious space.

If the buses are terrible in your city, you may think that buses are terrible in general. In truth, a city’s bus service is as good as its leaders and voters want it to be. Where voters have funded better bus services and cities have worked to give them priority, as in Seattle, ridership has soared.

The starvation of high-ridership public transit in America is a choice, one that Americans don’t have to make. I work in cities all over the developed world, but my U.S. clients always have the poorest transit budgets, requiring the most painful trade-offs. They can’t afford to run the frequent and reliable fixed-route services that would do well, so they are forced to run poor service, yielding low ridership, feeding the impression that transit is pointless