Abstract
After an exposition of the importance of the concept of diachronic identity and a short sketch of the bewildering confusion concerning the meaning of the terms intimately connected to it, an outline of the basic features of Whitehead’s process approach is presented in as far as it is relevant for the topic of the human person and identity. In a further step, Whitehead’s concept of ‘person’ as nested in this approach will be discussed and the dilemma between securing human identity on the one side and accounting at the same time for its flexible adaptivity to the environment on the other, will be elaborated. Then the concepts of strict and partial identity and the problem of the fragility of human identity, and even its possible loss, and how identity can be secured within this processorganismic conception of ‘person’ will be dealt with. Finally, the sources of partial diachronic identity within the framework of process philosophy will be discussed.