Rollo May

Rollo Reece May (April 21, 1909 – October 22, 1994) was an American existential psychologist and author of the influential book ''Love and Will'' (1969). He is often associated with humanistic psychology and existentialist philosophy, and alongside Viktor Frankl, was a major proponent of existential psychotherapy. The philosopher and theologian Paul Tillich was a close friend who had a significant influence on his work.

May's other works include ''The Meaning of Anxiety'' (1950, revised 1977) and ''The Courage to Create'' (1975), named after Tillich's ''The Courage to Be''. Provided by Wikipedia