David C. McClelland

David C. McClelland was an influential American psychologist best known for his work on motivation and personality. He developed the concept of "human motivation theory," identifying three primary needs that drive behavior: the need for achievement (desire for success), the need for affiliation (desire for social relationships), and the need for power (desire to influence others). McClelland's research emphasized how these needs shape individual and organizational behavior, influencing everything from leadership styles to workplace dynamics. His work remains significant in psychology, education, and business, helping to understand what motivates people in various contexts.