B.F. Skinner's psychological theories, particularly his work on operant conditioning, shaped our understanding of human behavior significantly. Skinner asserted that behavior is influenced by its consequences—reinforcements and punishments—which can be used to modify behavior. His experiments with radical behaviorism illuminated how external stimuli and environmental factors affect learning processes. Skinner's research laid the groundwork for applied behavior analysis and the development of behavioral therapies, and his ideas remain influential in education, psychology, and behavioral management.