Samuel A. Guttman has written:

'The concordance to The Standard edition of the complete psychological works of Sigmund Freud' -- subject(s): Concordances, Indexes, Psychoanalysis

The first techniques of psychological therapy in America were developed by Sigmund Freud, who introduced psychoanalysis in the late 19th and early 20th centuries. Freud's work was a major influence on the development of psychological therapy in the United States.

He suffered from depression.

Sigmund Freud

It was created in the 1880s by Sigmund Freud.