From the brilliantly witty and exuberant New York Times bestselling author Ken Jennings, a history of humor—from fart jokes on clay Sumerian tablets all the way up to the latest Twitter gags and Facebook memes—that tells the story of how comedy came to rule the modern world.For millennia of human history, the future belonged to the strong. To the parent who could kill the most animals with sticks and to the child who could survive the winter or the epidemic. When the Industrial Revolution came, masters of business efficiency prospered instead, and after that we placed our hope in scientific visionaries. Today, in a clear sign of evolution totally sliding off the rails, our most coveted trait is not strength or productivity or even innovation, but being funny. Yes, funniness. Consider: presidential candidates now have to prepare funny "zingers" for debates. Newspaper headlines and church marquees, once fairly staid affairs, must now be...