James Taylor (the Heartland Institute guy, not the folk singer, alas) has discovered humoral medicine. See, the Black Plague was caused by too much cold, after the Medieval Warm Period petered out. (God, why didn't those medieval physicians think to treat it with hot poultices and baths to reduce black bile? SO OBVIOUS.) Anyway, if we manage to stem the global warming tide, according to Taylor, we'll be setting the stage for a new outbreak of plague.
