Distinguished between gemeinschaft and gesellschaft.
Sociology as a separate science on the grounds that it has both an object patterned reularities as a group distinct from that of individuals and a substratum society as a whole.
Like other sociologists, considered the self to be a reflection of others. Used the term role-distance to describe the gap between who we are and who we portray ourselves to be
An Austrian physician and the found of psychoanalysis. Formed the idea of the id, ego, and superego