| American psychologist Abraham Maslow was a member of the humanistic school of psychology. Maslow proposed a theory of motivation based on a categorization of needs, suggesting that an individual progresses from satisfying basic needs such as those for food and sex to satisfying the highest need for what he called self-actualization, or the fulfilment of one's potential. Maslow believed that self-actualization could only be attained once basic needs had been met. |