How Did Rome Fall?

Friday, June 5th, 2009

David Frum notes that over the past three years, three excellent books have been published on the end of the Roman Empire — and by coincidence they came out in the order in which they should be read.

The first, The Fall of Rome: And the End of Civilization, by Bryan Ward-Perkins, emphasizes that Rome did in fact fall:

Fossils of cattle bones show that livestock withered in size between the peak of the Roman empire in 200 CE and the early medieval period. Not until the 1300s would cattle recover their Roman heft.The ice of the Greenland glaciers preserves frozen air from different historical periods. Air from the first and second centuries of the Common Era contains byproducts of smelting and other industrial activity. Such activity then disappears from the air for 17 centuries, not to reappear until the Industrial Revolution.

Even very ordinary Roman houses and buildings were roofed with tile. With the fall of Rome, tile manufacture ceases – and for the next thousand years, rulers and prelates were roofed by timber, everybody else by insect-infested thatch. The Romans made pottery by the tens of millions of units; to this day, one of Rome’s hills is a garbage dump filled with the broken shards of an estimated 50 million pots. Trade and manufacturing slows after 200, vanishes after 400. The dwindled population of Europe has to make do with crude, misshapen local handiwork. Coins and ironwork vanish. Not until the Victorian era did Europe recover Roman plumbing and road-building skills. Not until the 20th century did human beings improve on Roman concrete.

From the point of view of every aspect of material culture that can be measured and recorded, the overthrow of the Roman empire was a catastrophe that annihilated a millennium of material progress. North of the Alps especially, Europe in CE 700 looked much more like the Europe of 1500 years before than like the Europe of 500 years before.

The second book, The Fall of the Roman Empire: A New History of Rome and the Barbarians, by Peter Heather, emphasizes barbarian invasion:

Rome’s ferocious aggressiveness and radical untrustworthiness forced its barbarian neighbors to organize in self-defense. The non-urban and fragmented culture of 3rd century Germany evolves into larger-unit societies. Villages grew into towns, clans into tribes, tribes into something close to nations. The barbarians gained military effectiveness and hurled themselves upon the aggressor and enslaver. The balance abruptly tilted against Rome — very abruptly.Heather strongly argues against the idea of a “decline” of the Roman empire. After the civil wars and upheavals of the period 235-280, the empire had re-established itself more grimly powerful and centralized than ever. The army and bureaucracy grew, taxation became heavier, agriculturalists were enserfed, but Roman authority continued supreme. It might have continued supreme for much longer still, but for the accident of contingent events. The newly organized barbarian confederacies attacked with unprecedented ferocity in the years after 405 and gained a series of grand victories. Then came catastrophe for Rome: one of the barbarian confederacies, the Vandals, penetrated the previously untouched province of Spain, improvised a navy and invaded North Africa.

Since its seizure by Rome 550 years before, North Africa had been one of the most secure and prosperous of all the imperial domains. Its grandest estates were owned outright by the emperor and its huge agricultural surplus supported the cost of the imperial armies — armies that a low-productivity pre-modern society could only sustain through the ruthless exploitation of slave labor. The loss of North Africa in the 430s wrecked the finances of the western Roman empire, extinguishing the empire’s power to sustain its military forces. Desperate attempts to regain the province were easily repulsed — and the western Roman state collapsed, victim of a shattering military defeat.

The latest book, How Rome Fell: Death of a Superpower, by Adrian Goldsworthy, emphasizes the how:

It was not the barbarians who brought down Rome, argues Goldsworthy. It was the Romans themselves — the instability of their state and its tendency to erupt into civil wars. It was civil war that had felled the old Roman republic — destroying its institutions in an accelerating cycle of internecine violence from the 80s BCE onward and enhancing the appeal of one-man rule. The same internecine violence erupted as one-man rule faltered after 235. The Roman armies destroyed each other in the struggle for power, exposing the Roman state as a tempting victim to the enemies against whom the armies were supposed to defend.

Why American Soldiers Shoot a Glorified .22

Thursday, June 4th, 2009

The mainstream media will often refer to military-style assault rifles as high-power rifles, when they are, arguably, just the opposite. The main battle rifles of WWI and WWII were high-power rifles, but the M16 shoots a teeny-tiny round. So, why do American soldiers shoot a glorified .22?

In 1948, the Army organized the civilian Operations Research Office (ORO), mirroring similar operations research organizations in the United Kingdom. One of their first efforts, Project ALCLAD, studied body armor and the conclusion was that they would need to know more about battlefield injuries in order to make reasonable suggestions. Over 3 million battlefield reports from WWI and WWII were analyzed and over the next few years they released a series of reports on their findings.

The conclusion was that most combat takes place at short range. In a highly mobile war, combat teams ran into each other largely by surprise; and the team with the higher firepower tended to win. They also found that the chance of being hit in combat was essentially random — that is, accurate “aiming” made little difference because the targets no longer sat still. The number one predictor of casualties was the total number of bullets fired. Other studies of behavior in battle revealed that many U.S. infantrymen (as many as 2/3) never actually fired their rifles in combat. By contrast, soldiers armed with rapid fire weapons (such as submachine guns) were much more likely to have fired their weapons in battle. These conclusions suggested that infantry should be equipped with a fully-automatic rifle of some sort in order to increase the actual firepower of regular soldiers. It was also clear, however, that such weapons dramatically increased ammunition use and in order for a rifleman to be able to carry enough ammunition for a firefight they would have to carry something much lighter.

Existing rifles were poorly suited to real-world combat for both of these reasons. Although it appeared the new 7.62 mm T44 (precursor to the M14) would increase the rate of fire, its heavy 7.62 mm NATO cartridge made carrying significant quantities of ammunition difficult. Moreover, the length and weight of the weapon made it unsuitable for short range combat situations often found in jungle and urban combat or mechanized warfare, where a smaller and lighter weapon could be brought to bear faster.

These efforts were noticed by Colonel René Studler, U.S. Army Ordnance’s Chief of Small Arms Research and Development. Col. Studler asked the Aberdeen Proving Ground to submit a report on the smaller caliber weapons. A team led by Donald Hall, director of program development at Aberdeen, reported that a .22 inch (5.56 mm) round would have performance equal to larger rounds in most combat. With the higher rate of fire possible due to lower recoil it was likely such a weapon would inflict more casualties on the enemy. His team members, notably William C. Davis, Jr. and Gerald A. Gustafson, started development of a series of experimental .22 (5.56 mm) cartridges.

The M16 shoots its glorified .22 with roughly half the energy (1300 ft·lbf) of a .308 (2,472 ft·lbf) coming out of an M14, the gun it replaced — but it does so with very little recoil.

Empires of the Atlantic World

Thursday, June 4th, 2009

David Frum calls J.H. Elliott’s Empires of the Atlantic World a stupendous work of scholarship with a theme — since 1800, English-speaking America has had a much more successful history than Spanish-speaking America:

As he points out, in 1800, New Spain (the future Mexico) had an economy probably about 50% the size of that of the independent United States. By 1870, the Mexican economy was barely 5% of the American.

Before that, however, by any measure it was Spanish America that built the more exciting and thriving culture. Mexico City had a population of 100,000 people at a time when Boston was home to 5,000; Spanish America had 20 universities before British America built its third.

Much of our English-language history of the hemisphere is devoted to self-flattering explanations for our post-1800 success. It’s our superior culture, you see, or our marvelous decision to eschew the destructive pursuit of the false wealth of precious metals in favor of honest non-feudal toil.

Elliott punctures these self-congratulatory stories.

If there had lived large Indian populations in the Chesapeake Bay area, he dryly notes, the English settlers would have gladly exploited them. Lacking them, they imported black slaves instead where slaves paid — and only relied on their own labor where the bleak local landscape left them no other choice, as in Puritan New England.

New Englanders’ fierce religious prejudices helped reconcile New Englanders to their unprofitable fate, by condemning the Indians as literally satanic. It is a very sobering reflection that New England’s egalitarian traditions rest on a firm foundation of militant religious and racial exclusiveness. Meanwhile, the aristocratic culture of Spanish America made far more room than I had ever appreciated for the surviving aristocracy of Mexico and, especially, Peru. Well into the 18th century, upper-class Peruvians took pride in proving their ancestry from the ruling Incas as well as the conquistadors. The Incan oligarchy in the city of Cuzco retained its hold upon lands and populations until the Tupac Amaru uprising of the 1780s.

Later patterns of loyalty and rebellion owe much in Elliott’s telling to labor exploitation. Where small white populations held large nonwhite populations in service — Cuba, Barbados, Peru — local elites clung to the colonial power for protection. Where white populations were large and nonwhite populations relatively small, demands for independence came early and loud: New England, the Rio de la Plata colony that became Argentina.

Elliott contrasts the reaction of the Virginia planters to the collapse of tobacco prices in the 1760s to the reaction of Venezula planters when cacao prices collapsed in the 1770s. Virginians, enraged at the deterioration in their terms of trade, were drawn to anti-British agitation. Venezuelans, equally angry, were quickly drawn back to the paths of loyalty as they contemplated the risks of instability in a region where slaves outnumbered masters by a much larger margin than in the Chesapeake Bay.

Controversy Swirls Around E-Cigarettes

Thursday, June 4th, 2009

As I mentioned recently, controversy is swirling around e-cigarettes, which apparently must be stopped — for the children:

The American Lung Association, along with the American Cancer Society Cancer Action Network, the American Heart Association and the Campaign for Tobacco-Free Kids, recently called for e-cigarettes to be removed from the market. The groups say e-cigarettes have yet to be proven safe and that kids may be attracted to the products, some of which come in flavors like chocolate and strawberry. “Nobody knows what the consumers are actually inhaling,” says Erika Sward, director of national advocacy at the American Lung Association.

I don’t think many children are buying $100 e-cigarettes, even if they do offer fruity flavors. Anyway, notice how nobody knows translates to this must be stopped — even though a reasonable first guess is that e-cigarettes are much less harmful than what smokers are already smoking:

But e-cigarette companies say their product is a better alternative to cigarettes because there is no smoke or combustion involved. “Anybody who doesn’t think this product without any smoke attached to it is orders of magnitude less harmful than cigarettes just has no concept of basic science,” says Jack Leadbeater, president and chief executive of Scottsdale, Ariz.-based Sottera Inc., which sells the Njoy brand of electronic cigarettes.

David Henderson cites this as another example of the bizarre world of regulation — in which regulators rarely seem to care about what they say they care about:

Now, if the people who favored the smoking bans really cared about second-hand smoke, they would applaud such a development, right? But they haven’t. [...] It’s probably true that e-cigarettes have not been proved safe. But then you would think, given the potentially huge value of such devices, that the skeptics would want some evidence of safety. Instead, they call for e-cigarettes to be banned.

It gets more bizarre. The FDA wants to regulate the device, not because it’s like cigarettes, but because it could be used by those who want to quit smoking.

You see, the FDA currently has the power to regulate smoking-cessation products but not tobacco — and we couldn’t let that power go unused, could we?

We haven’t had much trouble from Carthage recently

Wednesday, June 3rd, 2009

Analogies ought to be used to elucidate and explain, David Frum says, but the analogy between the United States and Rome is all too often used to scold, not to enlighten:

“History never repeats itself,” the Yale medievalist Roberto Lopez used to warn his students. “It only appears to do so, to those who do not pay attention to the details.” Most comparisons of the United States and imperial Rome operate in exactly the low-detail environment Lopez described. Rome was a republic; America is a republic. Rome had gladiators; America has football. Rome had barbarian invaders; America has illegal immigrants. Rome fell; so America must fall. What else does one need to know?Quite a lot, actually.

Frum reviews Madden’s Empires of Trust — “How Rome Built — and America Is Building — a New World”:

Empires, Madden notes, have been a common phenomenon in human history. An enterprising warlord puts together an effective military force, attacks his neighbors, and collects tribute from them. These empires look mighty while they last, but they seldom last long. They exist to exploit. They command no loyalty. Eventually they meet defeat, their military ceases to awe, and they collapse. The story is the same from the Assyrians to the Nazis.As against these Ozymandian episodes, the Romans extended their dominance over a vast realm of time and space. From the middle of the 2nd century B.C.E. to the end of the 4th century C.E., a span of almost a half-millennium, they held a practical monopoly of organized force over all the world they knew. How did they do it?

One familiar answer emphasizes Roman ruthlessness. Defy the Romans, and you would end up like the Carthaginians: your men slaughtered, your women and children sold into slavery, your city burned, the ground plowed with salt.

Madden invites us to consider another answer. As the Romans saw it, he writes, they led an alliance and association of independent Italian city-states, with Rome merely first among equals. This alliance had grown up in response not to the Roman lust for power or slave labor but to genuine security needs.

A small village on a plain of many small villages, Rome had waged war to eliminate threatening enemies. The great trauma of 390 B.C.E., when the town was sacked by marauding Celts, had forced Rome’s leaders to think hard about military organization and generalship. They designed new military forms that won battles more consistently than did the forces of their neighbors.

But the early Romans, like the early Americans, were a deeply isolationist people. Absorbed in their own complex political institutions and intensely local religion, they had no interest in governing their neighbors after defeating them. Instead, they made allies of them. The Romans would swear to protect their new allies; in return, the new allies would pledge to furnish troops when called upon.

The ancient Latins took oaths very seriously, and the Romans rapidly gained a reputation as extremely reliable allies. Writing 200 years later, the authors of the Book of Maccabees paid tribute to this Roman trait: “With their friends and those who have relied upon them, they kept friendship.”

The problem was that this very reliability continually created new security challenges. Having conquered their neighbors in order to secure their own horizon, the Romans now found themselves committed to protect their new friends against threats. New commitments drew them into new wars, led them to defeat new enemies, swear these new enemies into the alliance, only to find themselves with yet a further concentric ring of enemies.

The logic of this system eventually led the Romans to unite the entire Italian peninsula under their leadership, a task effectively complete by about 300 B.C.E. Yet this united Italy was a land of many governments, each sovereign, each with its own institutions, each with its own army.

Madden argues that Italy in the 200’s B.C.E. looked a good deal like NATO after 1950. One ally was clearly the strongest and most influential. But that strength did not rest on terror. It rested on the leading ally’s credibility. The other allies trusted the leading ally not only to defend them when defense was called for, but to use its power responsibly in the interests of all. They had built an empire not of conquest, but of trust. And it is this, Madden holds, that the United States has done as well.

Consider this contrast:

The Roman system encountered its most severe test in the late 200’s B.C.E., when the Carthaginian general Hannibal invaded Italy. Hannibal was one of the great commanders of history, and his strategy against Rome was essentially the same as Alexander’s against Persia: insert an army into the territory of the enemy empire, win a battle or two, show the empire’s subjects they no longer need fear the empire’s power, and then watch the enemy empire shatter into fragments.The strategy worked for Alexander. It failed for Hannibal. Despite inflicting defeat after defeat upon the Roman army on the territory of Italy, Hannibal could not crack the Roman alliance. Even after he sacked Italian cities in an effort to make the Italians fear him more than the Romans, the alliance held firm.

Hannibal’s difficulty was that the Italians did not fear the Romans. They trusted them—and they preferred the deal the Romans offered them not only to subordination by Hannibal and Carthage but even to the recovery of their own independence. Such a recovery would have meant returning to a condition in which each Italian city must constantly prepare for war against any and all of its neighbors. Roman rule, by contrast, meant peace and security for all.

The Romans finally turned the tide of war by doing to the Carthaginians what the Carthaginians had done to them: they landed an army on their home territories, first in Spain and finally in what is now Tunisia. The result dramatized the difference between the Roman and Carthaginian polities: when Rome won a battle against Carthage, Carthage’s allies did desert, and the Carthaginian empire disintegrated.

Yet even under these conditions, Rome did not destroy Carthage. Only after a third war a half-century later did Rome finally impose its notorious “Carthaginian peace.” (Two thousand years later, the U.S. Congress would debate how to treat Germany once World War II came to an end. One hard-line Senator was accused of seeking a “Carthaginian peace.” He answered: “Well we haven’t had much trouble from Carthage recently.”)

Trustworthy security is a precious and highly desired resource.

The Defiance of Common Experience

Wednesday, June 3rd, 2009

Modernism (and its stylistic descendants), Michael Blowhard says, can be reasonably conceived of as the defiance of common experience:

Modernism: Endless experiments based in theory and speculation, very few of which work out. Tradition: Practices based in experience that almost always succeed.

He decided to turn on the carry-everywhere mini-vidcam he just treated himself to to record what he came across:

Cigarettes Without Smoke, or Regulation

Wednesday, June 3rd, 2009

Smokers are starting to enjoy electronic cigarettes without smoke — but what concerns the New York Times is that these are also cigarettes without regulation:

For $100 to $150 or so, a user can buy a starter kit including a battery-powered cigarette and replaceable cartridges that typically contain nicotine (though cartridges can be bought without it), flavoring and propylene glycol, a liquid whose vaporizing produces the smokelike mist. When a user inhales, a sensor heats the cartridge. The flavorings include tobacco, menthol and cherry, and the levels of nicotine vary by cartridge.

Propylene glycol is used in antifreeze, and also to create artificial smoke or fog in theatrical productions. The F.D.A. has classified it as an additive that is “generally recognized as safe” for use in food. But when asked whether inhaling it was safe, Dr. Richard D. Hurt, director of the Nicotine Dependence Center at the Mayo Clinic, said, “I don’t think so, but I’m not sure anyone knows for sure.”

Of the e-cigarettes themselves, Dr. Hurt added: “We basically don’t know anything about them. They’ve never been tested for safety or efficacy to help people stop smoking.”


Public health officials also worry that the devices’ fruit flavors, novelty and ease of access may entice children.

“It looks like a cigarette and is marketed as a cigarette,” said Jonathan P. Winickoff, an associate professor at the Massachusetts General Hospital for Children and chairman of the American Academy of Pediatrics Tobacco Consortium. “There’s nothing that prevents youth from getting addicted to nicotine.”

Indeed, there’s nothing to stop kids from buying electronic cigarettes — except for the $100 price tag.

The Quagmire Ahead

Wednesday, June 3rd, 2009

David Brooks describes the quagmire ahead:

The Obama plan won’t revolutionize G.M.’s corporate culture. It could make things worse.

First, the Obama plan will reduce the influence of commercial outsiders. The best place for fresh thinking could come from outside private investors. But the Obama plan rides roughshod over the current private investors and so discourages future investors. G.M. is now a pariah on Wall Street. Say farewell to a potentially powerful source of external commercial pressure.

Second, the Obama plan entrenches the ancien régime. The old C.E.O. is gone, but he’s been replaced by a veteran insider and similar executive coterie. Meanwhile, the U.A.W. has been given a bigger leadership role. This is the union that fought for job banks, where employees get paid for doing nothing. This is the organization that championed retirement with full benefits at around age 50. This is not an organization that represents fundamental cultural change.

Third, the Obama approach reduces the fear that impels change. The U.S. government will own most of G.M. It would be politically suicidal for the Democrats, or whoever is in power, to pull the plug on the company — now or ever. Therefore, the current managers can rest assured that they never need to fear liquidation again. There will always be federal subsidies for their own mediocrity.

Fourth, the Obama plan dilutes the company’s focus. Instead of thinking obsessively about profitability and quality, G.M. will also have to meet the administration’s environmental goals. There is no evidence G.M. is good at building the sort of small cars the administration demands. There is no evidence that there is a large American market for these cars. But G.M. now has to serve two masters, the market and the administration’s policy goals.

Fifth, G.M.’s executives and unions now have an incentive to see Washington as a prime revenue center. Already, the union has successfully lobbied to move production centers back from overseas. Already, the company has successfully sought to restrict the import of cars that might compete with G.M. brands. In the years ahead, G.M.’s management will have a strong incentive to spend time in Washington, urging the company’s owner, the federal government, to issue laws to help it against Ford and Honda.

Sixth, the new plan will create an ever-thickening set of relationships between G.M.’s new owners — in government, management and unions. These thickening bonds between public and private bureaucrats will fundamentally alter the corporate culture, and not for the better. Members of Congress are also getting more involved in the company they own, and will have their own quaint impact.

The end result is that G.M. will not become more like successful car companies. It will become less like them.

The Rising Marginal Cost of Originality

Tuesday, June 2nd, 2009

If you’ve ever asked yourself, What is wrong with modern ____? — modern art, modern architecture, modern whatever — David Friedman suggests that the problem might be the rising marginal cost of originality:

Suppose you are the two hundred and ninetieth city planner in the history of the world. All the good ideas have been used, all the so-so ideas have been used, and you need something new to make your reputation. You design Canberra. That done, you design the Combs building at ANU, the most ingeniously misdesigned building in my personal experience, where after walking around for a few minutes you not only don’t know where you are, you don’t even know what floor you are on.

I call it the theory of the rising marginal cost of originality — formed long ago when I spent a summer visiting at ANU.

It explains why, to a first approximation, modern art isn’t worth looking at, modern music isn’t worth listening to, and modern literature and verse not worth reading. Writing a novel like one of Jane Austen’s, or a poem like one by Donne or Kipling, only better, is hard. Easier to deliberately adopt a form that nobody else has used, and so guarantee that nobody else has done it better.

Bryan Caplan disagrees, because he enjoys the top 10 percent of popular media — Dexter, Big Love, etc.

Keep It Or Toss It?

Tuesday, June 2nd, 2009

You’ve probably found something in the fridge and asked yourself, Keep it or toss it? I doubt you thought to consult an online database — but now you can.

Back to basics, squared

Tuesday, June 2nd, 2009

The American Indian Public Charter and its two sibling schools are spitting in the eye of mainstream education — and teaching their students well:

Not many schools in California recruit teachers with language like this: “We are looking for hard working people who believe in free market capitalism. . . . Multicultural specialists, ultra liberal zealots and college-tainted oppression liberators need not apply.”

That, it turns out, is just the beginning of the ways in which American Indian Public Charter and its two sibling schools spit in the eye of mainstream education. These small, no-frills, independent public schools in the hardscrabble flats of Oakland sometimes seem like creations of television’s “Colbert Report.” They mock liberal orthodoxy with such zeal that it can seem like a parody.

School administrators take pride in their record of frequently firing teachers they consider to be underperforming. Unions are embraced with the same warmth accorded “self-esteem experts, panhandlers, drug dealers and those snapping turtles who refuse to put forth their best effort,” to quote the school’s website.

Students, almost all poor, wear uniforms and are subject to disciplinary procedures redolent of military school. One local school district official was horrified to learn that a girl was forced to clean the boys’ restroom as punishment.

By standard measures, these “right-wing” schools are among the very best in California:

The Academic Performance Index, the central measuring tool for California schools, rates schools on a scale from zero to 1,000, based on standardized test scores. The state target is an API of 800. The statewide average for middle and high schools is below 750. For schools with mostly low-income students, it is around 650.

The oldest of the American Indian schools, the middle school known simply as American Indian Public Charter School, has an API of 967. Its two siblings — American Indian Public Charter School II (also a middle school) and American Indian Public High School — are not far behind.

Among the thousands of public schools in California, only four middle schools and three high schools score higher. None of them serves mostly underprivileged children.

The “secret” to their success isn’t much of a secret:

The short answer is that American Indian attracts academically motivated students, relentlessly (and unapologetically) teaches to the test, wrings more seat time out of every school day, hires smart young teachers, demands near-perfect attendance, piles on the homework, refuses to promote struggling students to the next grade and keeps discipline so tight that there are no distractions or disruptions. Summer school is required.

Back to basics, squared.

The Small-Mouthed Ape

Tuesday, June 2nd, 2009

Naked ape? Bipedal ape? Big-brained ape? Perhaps we’re simply the small-mouthed ape:

Apes began to morph into humans, and the species Homo erectus emerged some two million years ago, Mr. Wrangham argues, for one fundamental reason: We learned to tame fire and heat our food.“Cooked food does many familiar things,” he observes. “It makes our food safer, creates rich and delicious tastes and reduces spoilage. Heating can allow us to open, cut or mash tough foods. But none of these advantages is as important as a little-appreciated aspect: cooking increases the amount of energy our bodies obtain from food.”

He continues: “The extra energy gave the first cooks biological advantages. They survived and reproduced better than before. Their genes spread. Their bodies responded by biologically adapting to cooked food, shaped by natural selection to take maximum advantage of the new diet. There were changes in anatomy, physiology, ecology, life history, psychology and society.” Put simply, Mr. Wrangham writes that eating cooked food — whether meat or plants or both — made digestion easier, and thus our guts could grow smaller. The energy that we formerly spent on digestion (and digestion requires far more energy than you might imagine) was freed up, enabling our brains, which also consume enormous amounts of energy, to grow larger. The warmth provided by fire enabled us to shed our body hair, so we could run farther and hunt more without overheating. Because we stopped eating on the spot as we foraged and instead gathered around a fire, we had to learn to socialize, and our temperaments grew calmer.

There were other benefits for humanity’s ancestors. He writes: “The protection fire provided at night enabled them to sleep on the ground and lose their climbing ability, and females likely began cooking for males, whose time was increasingly free to search for more meat and honey. While other habilines” — tool-using prehumans — “elsewhere in Africa continued for several hundred thousand years to eat their food raw, one lucky group became Homo erectus — and humanity began.”

Mr. Wrangham’s new book, Catching Fire, explores this idea in more detail.

How Could They Know?

Tuesday, June 2nd, 2009

Seth Roberts found that his dental health improved markedly once he started drinking a few tablespoons of flaxseed oil every day. Tyler Cowen got even more dramatic results — his gum specialist called off his surgery.

We’re tempted to ask, How could dentists not know about this?, but the real question is How could they know?

In The Economy of Cities, Jane Jacobs makes this point. For a long time, Jacobs says, farming was a low-yield profession. Then crop rotation schemes, tractors, cheap fertilizer, high-yield seeds, and dozens of other labor-saving yield-increasing inventions came along. Farmers didn’t invent tractors. They didn’t invent any of the improvements. They were busy farming. Just as dentists are busy doing dentistry and dental-school professors are busy studying conventional ways of improving gum health.

Jacobs also writes about the sterility of large organizations — their inability to come up with new goods and services. On the face of it, large organizations, such as large companies, are powerful. Yes, they can be efficient but they can’t be creative, due to what Jacobs calls “the infertility of captive divisions of labor.” In a large organization, you get paid for doing X. You can’t start doing X+Y, where Y is helpful to another part of the company, because you don’t get paid for doing Y. A nutrition professor might become aware of the anti-inflammatory effects of flaxseed oil but wouldn’t study its effects on gum health. That’s not what nutrition professors do.

Zulu Warfare

Tuesday, June 2nd, 2009

Zulu Warfare replaced skirmishing with shock tactics, analogous to ancient Greek hoplite warfare, which allowed them to sweep away the other Nguni tribes — until the British arrived:

The Southern Nguni Tribes became agriculturalists in the 19th century. Many were migrants from the intial exodus. They abandoned their pastoral economy and switched to agriculture along the coast. They began growing corn. Corn was a new crop from the Americas and was especially valuable as it grew in more adverse conditions than wheat and produced more calories per acre. This allowed an unprecedented population boom.

These Nguni tribes in the south were regimentized into the British Army. They were provided rifles, uniforms, and training. British officers led these units, with Indian NCOs, and Nguni conscripted riflemen, which more or less reflected the racial stratification in Africa under colonial rule.

The Nguni and British military defeated the Zulu Empire through superior firepower. It was not just the rifles though. The British used the same concept of heavy infantry and shock tactics as the Zulus, so they were not intimidated by this form of combat. While rifles were useful for ranged combat, the real advantage was the close order formations of the British combined with the steel bayonet. Rifles reduced the Zulu numbers and the British could stand their ground and win the ensuing melee.

Personal Holodeck

Tuesday, June 2nd, 2009

Johnny Chung Lee has been working quietly on Microsoft’s breakthrough Project Natal, which was recently demoed at E3. The vision video sells the concept:

As someone who has been working in interface and sensing technology for nearly 10 years, Lee says that this is an astonishing combination of hardware and software:

The 3D sensor itself is a pretty incredible piece of equipment providing detailed 3D information about the environment similar to very expensive laser range finding systems but at a tiny fraction of the cost. Depth cameras provide you with a point cloud of the surface of objects that is fairly insensitive to various lighting conditions allowing you to do things that are simply impossible with a normal camera.

But once you have the 3D information, you then have to interpret that cloud of points as “people”. This is where the researcher jaws stay dropped. The human tracking algorithms that the teams have developed are well ahead of the state of the art in computer vision research. The sophistication and performance of the algorithms rival or exceed anything that I’ve seen in academic research, never mind a consumer product. At times, working on this project has felt like a miniature “Manhattan project” with developers and researchers from around the world to coming together to make this happen.

We would all love to one day have our own personal holodeck. This is a pretty measurable step in that direction.