McDougall treated instincts as motivational forces rather than fixed action scripts. An instinct such as avoidance, curiosity, or parental care could orient behavior toward an end, while learning shaped how that tendency was expressed. This interaction allowed the same underlying motive to contribute to different actions across individuals and situations, linking innate tendencies with experience.
Hormic psychology directed attention toward the purposes organizing behavior, rather than explaining conduct only through mechanical processes. In this view, actions express underlying drives toward goals, giving motivation a central role in psychological explanation. The approach therefore broadened analysis beyond immediate responses and helped sustain debates about how purposeful behavior should be understood.
McDougall’s claims about inherited mental differences remain controversial, so they should be treated as disputed contributions rather than settled conclusions. Their importance lies partly in how they exposed tensions between inherited tendencies, learning, and social experience. Reviewing these claims in context helps distinguish his broader motivational ideas from positions that continue to invite critical evaluation.
By emphasizing organized goals and motivational forces, McDougall encouraged psychologists to examine why individuals act, not only how behavior appears. His framework connected innate tendencies with learned patterns, making it relevant to questions about personality development and motivation. This emphasis contributed to research traditions concerned with the organization of conduct around purposes.
McDougall extended purposive and instinct-based analysis beyond individual conduct to group behavior and social influence. This helped establish social psychology as an area concerned with how motivational tendencies operate within collective life. His work therefore connected personal motives with broader patterns of interaction, offering an early framework for studying both individual and group conduct.
McDougall remains historically relevant because his work connected motivation, personality, social behavior, and debates about inherited mental differences. His purposive perspective challenged accounts that treated behavior as purely mechanical, while the controversies surrounding some of his claims show how psychological theories can influence research and remain subject to reassessment.