Ethicists who believe in evolution are trying to figure out an evolutionary explanation for why people universally have a sense of right and wrong. This line of study is so new that it doesn't yet have a name, although some have suggested "neuroethics" or "moral neuroscience".

Ref: Discover, 4/04, pp. 60-65, Carl Zimmer, "Whose Life Would You Save?" Photo: portrait of Immanuel Kant.(PD)