Final answer:
Abraham Maslow and Carl Rogers were the foremost figures in the Human Relations Movement, advocating for self-actualization, free will, and human goodness against the deterministic psychoanalysis and behaviorism of their time.
Step-by-step explanation:
The main contributors to the Human Relations Movement were Abraham Maslow and Carl Rogers, two pioneering humanistic psychologists. They focused on the growth potential of healthy individuals and promoted the idea that people have an innate desire to become self-actualized.
Maslow is known for his hierarchy of needs theory, suggesting that human needs must be met in a specific order, culminating in the need for self-actualization. Rogers contributed with his client-centered approach to therapy, which is still widely used. Both emphasized free will, self-determination, and the inherent goodness and growth potential in people.
They reacted against the deterministic views of psychoanalysis and the passive human model suggested by behaviorism, advocating for a psychology that recognized the depth and meaning of human experience and the capacity for self-directed change.