Eat the Old: Could Mass Cannibalism Solve a Future Food Shortage? The global human population is set to hit 7 billion on Oct. 31, and by century's end it will stand at 10 billion, according to the United Nations. That's a lot more mouths to feed. There's a very good chance that generating food from traditional farming and livestock practices will not be able to keep pace with this boom. What if a worldwide food shortage were to become so terribly dire that people resorted to eating . . . people? In such a dreadful event, the most-sensible first choice...