Why do we want—and why do we do—so many things that are bad for us? And how can we stop? In Mean Genes economist Terry Burnham and biologist Jay Phelan offer advice on how to conquer our own worst enemy—our survival-minded genes. Having evolved in a time of scarcity, when our ancestors struggled to survive in the wild, our genes are poorly adapted to the convenience of modern society. They compel us to overeat, spend our whole paycheck, and cheat on our spouses. But knowing how they work, Burnham and Phelan show that we can trick these "mean genes" into submission and cultivate behaviors that will help us lead better lives. A lively, humorous guide to our evolutionary heritage, Mean Genes illuminates how we can use an understanding of our biology to beat our instincts—before they beat us.