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<!--Leave the following to article just linked?: which seeks to analyze the structure of human existence with the aim of understanding the reality underlying all situations of humans in crises--><!--?: ((1))-->. The philosopher and theologian Paul Tillich was a close friend who had a significant influence on his work.<!-- --> Wikipedia