 There are three main views: animalism, which says that we are human animals (Snowdon 1990, Olson 1997, 2007); personism, which says that we are creatures with the capacity for self-awareness; and mindism, which says that we are minds (which may or may not have the capacity for self-awareness) (McMahan 2002). Animalists typically say that we persist over time just in case we remain the same animal; mindist typically suggest that our persistence requires our remaining the same mind. Personism is usually paired with the view that our persistence is determined by our psychological features and the relations among them (Locke 1689, Parfit 1984). (For more on what we are, see the entry on Personal Identity.)