A provocative claim has been circulating in biology and philosophy for more than a decade: we have never been individuals.

Identity development during adolescence and emerging adulthood encompasses the processes by which individuals explore, commit to and integrate values, beliefs and roles to form a coherent sense of ...

An identity crisis is a phase many people go through when they question or reassess who they are. A search for identity is common during the teenage years but people may also reassess their lives ...