Seriously now. Why don't people in central Oklahoma have basements to protect them from tornadoes? The answer, according to the engineers and geologists I spoke with for a column at Ensia magazine, is almost entirely cultural. In fact, people who study disasters say that all natural disasters are really cultural ones — created when environmental forces run headlong into complex human social systems. And that presents an interesting question: How do you protect people from tornadoes in a state where most people don't want a basement?