Which of theses psychologists was the first to develop a modern theory of motivation?

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Henry Murray was the first psychologist to develop a modern theory of motivation with his concept of psychogenic needs that he introduced in his book "Explorations in Personality" (1938). While Maslow's hierarchy of needs is more well-known, it is based on Murray's earlier work. McClelland also made significant contributions to the study of motivation, particularly in his work on achievement motivation. Rogers is known for his humanistic approach to psychology and his client-centered therapy, but he did not develop a theory of motivation.

Which of Theses Psychologists Was the First to Develop a Modern