David Velleman, "The Centered Self"

Our drive to know what we're doing makes it possible for us to have effective intentions and to give others reliable reasons to think that we will do what we say we will. This helps explain how mutual declarations of intention can help us escape the prisoner's dilemma.

David Velleman, "Self to Self"

Draws a distinction between a psychological notion of self and the metaphysical notion of a person. What we're interested in in splitting cases is not survival, but psychological continuity of a special kind.

For a more detailed commentary on this article, see the philosophy of mind workshop.