Abstract

'The Biological Approach,' Eric T. Olson writes, 'is the view that you and I are human animals, and that no sort of psychological continuity is either necessary or sufficient for a human animal to persist through time.' Human 'persons' are self-aware human animals which, as they aren't essentially self aware, aren't essentially persons. Ranged against this position is the 'Psychological Approach,' a spectrum of views according to which 'some psychological relation is both necessary and sufficient for one to survive.' The Psychological Approach is sufficiently broad to include the view that you survive because of a relation between your basic mental capacities in a physically continuous realizer, e.g., your cerebrum. The Biological Approach merits more attention than it has received from philosophers, and Olson's lucid and engaging defense of it is welcome. His book is full of interesting arguments of which I will consider only the most central.