Drawing on neuroscience, psychology, history, and even pop culture, Richard David Precht deftly elucidates the questions at the heart of human existence: What is truth? Does life have meaning? Why should I be good? and presents them in concise, witty, and engaging prose. The result is an exhilarating journey through the history of philosophy and a lucid introduction to current research on the brain. Who Am I? And If So, How Many? is a wonderfully accessible introduction to philosophy. The book is a kaleidoscope of philosophical problems, anecdotal information, neurological and biological science, and psychological research.