Quite to the contrary, I believe that an evolutionary perspective is the single most important idea for anyone who is interested in human behavior. To paraphrase Theodosius Dobzhansky, when seen in the light of evolution, the study of human behavior is, perhaps, intellectually the most satisfying and inspiring science. Without that light it becomes a pile of sundry facts — some of them interesting or curious but making no meaningful picture as a whole.
For example, people make New Year’s resolutions and, every year, losing weight and living a healthier lifestyle are among the most popular areas for self-improvement. Why?