1899 Sigmund Freud explores the nature of the unconscious and dream symbolism in The Interpretation of Dreams.
1903 Pierre Janet suggests that traumatic incidents generate emotionally charged beliefs, which influence an individual’s emotions and behaviors for many years.
1949 Jungian scholar Joseph Campbell publishes Hero With a Thousand Faces, detailing archetypal themes in literature from many different cultures throughout history.
1969 British psychologist John Bowlby states that human instinct is expressed as patterned action and thought in social exchanges.
Sigmund Freud introduced the idea that rather ...