John Locke's theory of identity not only provoked a strong reaction from his contemporaries and near‐contemporaries, it continues to influence philosophical discussions of identity to the present day. Locke thinks that finite intelligences have location/place, as well as temporal location. Some bodies, despite having proper parts, are easy cases, too. These are atoms and masses of atoms. Locke's attack on substance‐based theories of identity focuses mainly on theories of personal identity in which sameness of a thinking substance is necessary and (...) sufficient for personal identity. Locke's view of the identity of organisms, however, already rejects the notion that sameness of corporeal substance is either necessary or sufficient for the sameness of the organism. The most famous objection to Locke's theory of personal identity is that it not only fails to preserve transitivity, but in many cases is positively committed to a denial of transitivity. (shrink)