 This shift from replication to the process of reproduction in accounts of biological individuals has a longer history, particularly amongst those sensitive to the relationships between evolution and development. For example, James Griesemer (2000) has argued that biological reproduction involves fission and fusion requiring what he calls progeneration, a process that creates new entities through material overlap, and that that process is a crucial feature of how living agents evolve.  Section 6  takes up this issue in more detail in discussing reproduction, life cycles, and lineages.