Are evolutionary psychologists suggesting that people join groups for largely or entirely biological reasons?
No. Remember that evolutionary psychology is careful to take both biological and psychological determinants into account in a balanced way. Groups form because they were adaptive in ancient environments, resulting in neurological developments that now support joining groups. However, the specific groups people join and their behavior in those groups are strongly influenced by environmental factors. 3. I attend a large university where the dorms and many classrooms are very crowded and where a great surge of humanity jams the campus every time classes pass. Is such crowding a significant source of my stress? Quite possibly, but it depends on you as an individual. In general, stress levels rise as crowding increases. However, many people adapt to crowded conditions and no longer experience much stress. For some, though, crowding continues to be a stressor.
