Also, almost everything in our society is made with petroleum, from aspirin, toothpaste, and tape to eyeglasses, refrigerants, and anesthetics. And food. This is the truly scary part. Global food production—the agricultural equipment, the fertilizers, preservation, and, of course, distribution of food—is completely dependent on petroleum. It’s no puzzle to biologists what happens to any population when its food supply is radically reduced. When it happens to animals it’s called a die-off. But the implications of this equation in human terms are so unimaginably ghastly that most people would prefer to believe it’s impossible rather than think about it at all.