An overwhelming majority of scientists who have looked into the matter agree that global warming is underway and is... caused by people burning fossi… - James Howard Kunstler

Cheap oil had allowed populations to explode in precisely those parts of the world that had had, for millennia, a high infant mortality rate and modest life expectancy. Cheap oil was behind the "" that increased the food supply in the nonindustrial world. Oil was also behind many of the medicines and preventives that had neutralized… diseases. Now, suddenly, most of those children… survived, grew up, and produced more children who survived and grew up, and over the course of the twentieth century, the global populations hurtled into extreme numerical overshoot. Populations were, in effect, eating oil, notably in [the form of] food exports from the United States, where agribusiness had completely taken over from agriculture. Local farmers in Africa, Asia, or South America couldn’t compete with corporate Archer Daniels Midland’s oil-and-gas-based grain crops and U.S. government subsidies. There was no point in even bringing their hardscrabble crops to market when sacks of cheap American wheat sat on the docks of Pusan or Colombo. Farmers in those places felt that they had no choice but to migrate to the city and find some other way to get by. The only comparative advantage that these people possessed was their willingness to work for next to nothing. Cheap oil and free-market globalism turned comparative advantage into a new kind of feudalism, with the corporations as the lords and the overabundant locals as the serfs. And then, when the comparative advantage of cheap labor… of one place, […] was superseded by the cheaper labor… of another place, […] the corporations just moved their operations.

Western Civ[ilization]’s most infamous encounter with pandemic disease, so far, was the big first wave of the Black Death that had a marathon run from 1346 to 1353. That bug was the real deal. It killed folks left and right, every age group, every social station, and it killed them ugly. Few who caught it survived. Up to half the population of Europe perished, along with a lot of their social and economic ways. The cause of the Black Death was subject to every possible explanation except the actual one, Yersina pestis, a bacterium associated with rats and their insect parasites, fleas and lice, who also enjoyed an association with humans living in the generally squalid conditions of the day ­— the ancient Roman habit of bathing long forgotten. At the top of their list of causes was an angry God, and his wicked erstwhile subordinate, Satan. The “experts” of that time tended to cluster in the church hierarchy, with its drear obsessions and compulsions. The squishy boundary between the supernatural and reality loosed all manner of derangement. The Jews came in for much vilification, leading to massacres in Strasbourg, Mainz, and Cologne. On the whole, the episode represented a terrific humbling of humanity. The allegory of the Dance Macabre summed it up in [hu]mankind’s universal antic journey to… death. On the plus side, as modern interpolators [historians]… say, the bubonic plague winnowed down Europe’s population to a scale more congenial with its resource base. After that big first wave of the disease, [the] land was cheaper and human labor better rewarded. Eventually, more food got around. Incidentally, the plague provoked nostalgia for the classical antiquity of Greece and Rome, especially among the scholars of Florence, launching the extravaganzas of the Renaissance [which led to the Age of Exploration and the Scientific Revolution], the Enlightenment [which led to the Industrial Revolution which, in turn, led] eventually [to] our own pageant of techno-supremacist Modernity [which led to the problems we face today].

The germ theory, which emerged in the late nineteenth century, focused the world's attention on the specific agents responsible for... diseases, but the [physical,] social and ecological contexts are equally important [for it], and these are now coming more prominently into play with world population well beyond the limits of the earth's [sic] [...] [optimum] carrying capacity and with climate change... in progress. [...] Ecological... [pressures], rapid changes in land use, penetration of formerly inaccessible habitats, and disturbed migration routes can lead to the appearance or diffusion of a disease. While we may be able to identify [some, if not all] the microorganisms involved, we can be helpless in the face of it, and our behavior may still promote its spread.