To Rollo May, of the William Alanson White Institute of Psychiatry, Psychoanalysis, and Psychology in New York City, each person is responsible for the effects of his own actions. Yet, according to May, who has written many books on current psychosocial problems, including Power and Innocence, individual responsibility must be exercised within the context of human solidarity. Just as Robin Fox had spoken of the combination of man's innate nature with environmental elements as essential to ethical and human evolution, so May spoke of the creative tension engendered by the conflict between man's potential for both good and evil.