Final answer:
Humanistic psychology, developed in the 1950s and 1960s, underscores the potential for good inherent in all humans and prioritizes individual growth, self-determination, and self-actualization.
Step-by-step explanation:
The school of thought developed in the 1950s and 1960s that focuses on the potential of individuals and each person's unique viewpoint is b) Humanistic psychology. Humanistic psychology is a perspective within psychology that emphasizes the potential for good that is innate to all humans. It emerged as a response to the perceived limitations and determinism of both behaviorism and psychoanalytic theory. Proponents of humanism like Abraham Maslow and Carl Rogers believed in personal control, intentionality, the predisposition for "good," and the fulfillment of human potential through self-actualization. Humanistic psychology is considered the "third force" in psychology and it prioritizes the study of how healthy people develop, promoting concepts such as free will, self-determination, and personal growth.