The collection is made up of contributions supporting either simple or complex approaches to the question of personal identity. While the latter approach (also sometimes referred to as reductionism) is about explicating the notion of personal identity by pointing to other phenomena, the former (called also non-reductionism) is based on the premise that personal identity cannot be explicated by any other term for it is simple and unanalyzable. Yet, in both cases, there is no room for doubt about personal identity as such because it is taken for granted. No position denying it is discussed in the volume (which explains why Hume, for example, is seldom referred to).