... about thenature of human development from birth to death. It is concerned with the embedded-ness of evolution and ontogeny, of consistency and change, of human plasticity, and of the role that ... development of the field. With re-spect to the first of these polarizations, “grand” models of adolescence that purport-edly pertained to all facets of behavior and development predominated (e.g., ... entailed the study of teenage mothers, and interest in middle and old age frequently entailed the study of the“middle generation squeeze,” wherein the adult children of aged parents cared for...