Many people have an uneasy feeling that they may be missing out on something basic that would give their lives a significance it currently lacks. But how should we live? What is there to stop us behaving selfishly? In this account, which makes reference to a wide variety of sources and everyday issues, Peter Singer suggests that the conventional pursuit of self-interest is individually and collectively self-defeating. Taking into consideration the beliefs of Jesus, Kant, Rousseau, and Adam Smith amongst others, he looks at a number of different cultures, including America, Japan, and the Aborigines to assess whether or not selfishness is in our genes and how we may find greater satisfaction in an ethical lifestyle.