I want to know the answer to the following question:
Who was one of the earliest psychologists to take an explicit interest in identity?
All the background I'm provided with is that "The process of forming a viable sense of identity for the culture is conceptualized as an adolescent task, and those who do not manage a resynthesis of childhood identifications are seen as being in a state of 'identity diffusion' whereas those who retain their initially given identities unquestioned have 'foreclosed' identities (Weinreich & Saunderson 2003 p7-8).". Is that enough to answer the question?
Answer: no