The diversity of human environments Psychologists study how both biological and environmental factors—nature and nurture—shape people’s beliefs, emotions, and behavior. The environmental factor can vary enormously. You may have grown up in an industrialized world, with twenty-first-century communications and commerce, but some people still live in hunter-gatherer societies where they obtain food from plants and animals in the wild and live without clocks and calendars. Shown here are women from such a society, the Hadza culture of Tanzania, in East Africa (Kaare & Woodburn, 1999). How do you think you’d differ from your current self if you had been raised there?