Imagine yourself as a young child. You looked different, you thought differently, and you had different fears and desires than you do today. All your cells have died and been replaced (I think) and your personality has probably changed a lot too. So, in what way are you still the same person? This course will explore the question of personal identity through discussion of brain transplants, cloning, and growing up. We will examine our intuitions, consider moral and practical implications, and redefine how we see ourselves and others.