Notes from Charles C. Mann's 1493: Uncovering the New World Columbus Created
1 Two Monuments
THE SEAMS OF PANGAEA
Babies born on the day the admiral [Columbus] founded La Isabela—January 2, 1494—came into a world in which direct trade and communication between western Europe and East Asia were largely blocked by the Islamic nations between (and their partners in Venice and Genoa), sub-Saharan Africa had little contact with Europe and next to none with South and East Asia, and the Eastern and Western hemispheres were almost entirely ignorant of each other's very existence. By the time those babies had grandchildren, slaves from Africa mined silver in the Americas for sale to China; Spanish merchants waited impatiently for the latest shipments of Asian silk and porcelain from Mexico; and Dutch sailors traded cowry shells from the Maldive Islands, in the Indian Ocean, for human beings in Angola, on the coast of the Atlantic. Tobacco from the Caribbean ensorcelled the wealthy and powerful in Madrid, Madras, Mecca, and Manila. ...
But nothing like this worldwide exchange had existed before, still less sprung up so quickly, or functioned so continuously. No previous trade networks included both of the globe's two hemispheres; nor had they operated on a scale large enough to disrupt societies on opposite sides of the planet.
...
[Note: "Colon" is Christopher Columbus]
Colon's signal accomplishment was, in the phrase of historian Alfred W. Crosby, to reknit the seams of Pangaea. After 1492 the world's ecosystems collided and mixed as European vessels carried thousands of species to new homes across the oceans. The Columbian Exchange, as Crosby called it, is the reason there are tomatoes in Italy, oranges in the United States, chocolates in Switzerland, and chili peppers in Thailand. To ecologists, the Columbian Exchange is arguably the most important event since the death of the dinosaurs.
...
Colon and his crew did not voyage alone. They were accompanied by a menagerie of insects, plants, mam- mals, and microorganisms. Beginning with La Isabela, European expeditions brought cattle, sheep, and horses, along with crops like sugarcane {originally from New Guinea), wheat (from the Middle East), bananas (from Africa), and coffee (also from Africa). Equally important, creatures the colonists knew nothing about hitchhiked along for the ride. Earthworms, mosquitoes, and cockroaches; honeybees, dandelions, and African grasses; rats of every description—all of them poured from the hulls of Colon's vessels and those that followed, rushing like eager tourists into lands that had never seen their like before.
...
The viruses that cause smallpox, influenza, hepatitis, measles, encephalitis, and viral pneumonia; the bacteria that cause tuberculosis, diphtheria, cholera, typhus, scarlet fever, and bacterial meningitis—by a quirk of evolutionary history, all were unknown in the Western Hemisphere.
...
Ruddiman's idea was simple: the destruction of Indian societies by European epidemics both decreased native burning and increased tree growth. Each subtracted carbon dioxide from the air. In 2010 a research team led by Robert A. Dull of the University of Texas estimated that reforesting former farmland in American tropical regions alone could have been responsible for as much as a quarter of the temperature drop—an analysis, the researchers noted, that did not include the cutback in accidental fires, the return to forest of unfarmed but cleared areas, and the entire temperate zone. In the form of lethal bacteria and viruses, in other words, the Columbian Exchange (to quote Dull's team) "significantly influenced Earth's carbon budget." It was today's climate change in reverse, with human action removing greenhouse gases from the atmosphere rather than adding them—a stunning meteorological overture to the Homogenocene.
Flying the plane back across the Atlantic, the effects of the Little Ice Age are obvious in the Americas, too.
...
When Colon founded La Isabela, the world's most populous cities clustered in a band in the tropics, all but one within thirty degrees of the equator. At the top of the list was Beijing, cynosure of humankind's wealthiest society. Next was Vijayanagar, capital of a Hindu empire in southern India. Of all urban places, these two alone held as many as half a million souls. Cairo, next on the list, was apparently just below this figure. After these three, a cluster of cities were around the 200,000 mark: Hangzhou and Nanjing in China; Tabriz and Gaur in, respectively, Iran and India; Tenochtitlan, dazzling center of the Triple Alliance (Aztec empire); Istanbul (officially Kostantiniyye) of the Ottoman empire; perhaps Gao, leading city of the Songhay empire in West Africa; and, conceivably, Qosqo, where the Inka emperors plotted their next conquests. Not a single European city would have made the list, except perhaps Paris, then expanding under the vigorous rule of Louis XII. Colon's world was centered around hot places, as had been the case since Homo sapiens first stared in amaze- ment at the African sky.
Now, a century and a half later, that order is in the midst of change. It is as if the globe has been turned upside down and all the wealth and power are flowing from south to north. The once-lordly metropolises of the tropics are falling into ruin and decrepitude. In the coming centuries, the greatest urban centers will all be in the temperate north: London and Manchester in Britain; New York, Chicago, and Philadelphia in the United States. By 1900 every city in the top bracket will be in Europe or the United States, save one: Tokyo, the most Westernized of eastern cities.
2 The Tobacco Coast
LOWLY ORGANIZED CREATURES
...the common nightcrawler and the red marsh worm, creatures that did not exist in the Americas before 1492.
...
Exotic, intoxicating, addictive, and disdained by stuffy authorities, smoking had become an aristocratic craze. When Rolfe's shipment arrived, one writer estimated, London already had more than seven thousand tobacco "houses"—cafe-1ike places where the city's growing throng of nicotine junkies could buy and drink tobacco. Unfortunately, because the sole source of fine tobacco were the colonies of hated Spain, the weed in England was hard to obtain, costly (the best tobacco sold for its weight in silver), and vaguely unpatriotic.
...
Huge numbers ofthese beasts, he noted, live beneath our feet; indeed, the total mass of the earthworms in a cow pasture may be many times the mass of the animals grazing above them. Lit- erally eating their way through the soil, earthworms create net- works of tunnels that let in water and air. In temperate places like Virginia, earthworms can turn over the upper foot of soil every ten or twenty years; tiny ecological engineers, they reshape entire expanses.
...
What is clear is that before the arrival of Europeans, New England and the upper Midwest had no earthworms—they were wiped out in the last Ice Age. Earthworms from the south didn't move north after the glaciers melted because the creatures don't travel long distances unless they are transported by human agency. "If they're born in your backyard, they'll stay inside the fence their whole lives," John W. Reynolds, editor of Megadrihgica, perhaps the premier U.S. earthworm journal, ex- plained...
In worm-free woodlands, leaves pile up in drifts on the forest floor. When earthworms are introduced, they can do away with the leaf litter in a few months, packing the nutrients into the soil in the form of castings (worm excrement). As a result, according to Cindy Hale, a worm researcher at the University of Minnesota, "everything changes." Trees and shrubs in wormless places depend on litter for food. If worms tuck nutrients into the soil, the plants can't find them. Many species die off. The forest becomes more open and dry, losing its understory, including tree seedlings. Meanwhile, earthworms compete for food with small insects, driving down their numbers. Birds, lizards, and mammals that feed in the litter decline as well.
...
Purely as a business venture, Jamestown was a disaster. Despite the profits from tobacco, its backers suffered such heavy losses that their venture collapsed ignominiously. Nonetheless the colony left a big mark: it inaugurated the great struggles over democracy (the colony established English America's first representative body) and slavery (it brought in English America's first captive Africans) that have long marked U.S. history. Rolfe's worms, as one might call them, illustrate another aspect of its course: Jamestown was the opening salvo, for English America, of the Columbian Exchange. In biological terms, it marked the point when before turns into after. Setting up camp on the marshy Jamestown peninsula, the colonists were, without intending it, bringing the Homogenocene to North America. Jamestown was a brushfire in a planetary ecological conflagration.
STRANGE LAND
Most big animals are tamable, in the sense that they can be trained to lose their fear of people, but only a few species are readily domesticable—that is, willing to breed easily in captivity, thereby letting humans select for useful characteristics. In all of history, humankind has been able to domesticate only twenty-five mammals, a dozen or so birds, and, possibly, a lizard. Just six of these creatures existed in the Americas, and they played comparatively minor roles: the dog, eaten in Central and South America and used for labor in the far north; the guinea pig, llama, and alpaca, which reside in the Andes; the turkey, raised in Mexico and the U.S. Southwest; the Muscovy duck, native to South America despite its name; and, some say, the iguana, farmed in Mexico and Central America.
...
Compared to England, Tsenacomoco had slower communications (no galloping horses), a dearth of plowed fields (no straining oxen) and pastures (no grazing cattle), and fewer and smaller roads (no carriages to accommodate). Battles were fought without cavalry; winters endured without wool; logs skidded through the forest without oxen. Distances loomed larger when people had to walk from place to place; indeed, in terms of the time required for Powhatan's orders to reach his minions, Tsenacomoco may have been the size of England itself (it was much less populous, of course).
...
Except for defensive palisades, Powhatan farmers had no fences around their fields. Why screen off land if no cattle or sheep had to be kept inside? The English, by contrast, regarded well-tended fences as hallmarks of civilization, according to Virginia D. Anderson, a historian at the University of Colorado at Boulder. Fenced fields kept animals in; fenced woodlots kept poachers out. The lack of physical propertv demarcation signified to the English that Indians didn't truly occupy the land—it was, so to speak, unimproved.