Your professor is about to give a lecture on the history of psychoanalysis. which theorist is your professor most likely to focus his lecture on?

The answer is "Sigmund Freud".

Sigmund Freud (1856 to 1939) was known as the founding father of psychoanalysis, a strategy for treating psychological instability and furthermore a hypothesis which clarifies human conduct. 
Freud trusted that occasions in our adolescence impact our grown-up lives, molding our identity. For instance, uneasiness starting from awful encounters in a man's past is escaped cognizance, and may cause issues during adulthood.