The Sepember 5 New Yorker has an interesting profile of Derek Parfit, though it is subscription-access only.  Lots of interseting tidbits, for example:

When Derek was seven, he became religious and decided to be a monk. He prayed all the time and tried vainly to persuade his parents to go to church. But at eight he lost his faith: he decided that a good God would not send people to Hell, and so if his teachers were wrong about God’s goodness they must also be wrong about God’s existence. His argument was flawed but convincing—he never believed in God again.

Well, almost.  As the article notes, he definitely believes in objctive moral truth!