Why are you attracted to a certain "type?" Are you a morning person? And why do you vote the way you do? We're constantly seeking answers to these fundamental sorts of questions, and now, Bill Sullivan has the answers. The foods we enjoy, the people we love, the emotions we feel, and the beliefs we hold can all be traced back to our DNA, germs, and environment. Mixing cutting-edge research, relatable humor, and everyday language, Sullivan clarifies how genetics, microbiology, and psychology work together to influence our personality and actions, shining a light on who we really are—and how we might become our best selves.