Which psychologist developed the concept of the "self-actualization" need?

The concept of "self-actualization" is an integral part of Maslow's hierarchy of needs, which is a psychological theory that outlines a progression of human motivations. According to Maslow, self-actualization represents the highest level of psychological development, where individuals realize their full potential and engage in personal growth. This need emerges after the more basic needs (such as physiological, safety, love and belonging, and esteem) have been satisfied.

Maslow believed that self-actualization involves not only achieving personal goals but also the fulfillment of unique potentials, creativity, and authenticity. It reflects a desire to become everything that one is capable of becoming, underscoring its importance in understanding human motivation and behavior.

Other psychologists like Freud, Wundt, and Skinner focused on different aspects of psychology, such as psychoanalysis, structuralism, and behaviorism, respectively, and did not develop the concept of self-actualization. Their theories address various psychological processes but do not encompass the idea of reaching one's full potential as Maslow does.