Friedrich Salomon Perls, better known as Fritz Perls, was a German-born psychiatrist, psychoanalyst and psychotherapist. Perls coined the term "Gestalt therapy" to identify the form of psychotherapy that he developed with his wife, Laura Perls, in the 1940s and 1950s. Perls became associated with the Esalen Institute in 1964 and lived there until 1969.

The Esalen Institute, commonly called Esalen, is a non-profit American retreat center and intentional community in Big Sur, California, which focuses on humanistic alternative education. The institute played a key role in the Human Potential Movement beginning in the 1960s. Its innovative use of encounter groups, a focus on the mind-body connection, and their ongoing experimentation in personal awareness introduced many ideas that later became mainstream.