Theory of human evolution / From Wikipedia, the free encyclopedia
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Parasite-stress theory, illustrated by researchers Corey Fincher and Randy Thornhill, is a theory of human evolution proposing that parasites and diseases encountered by a species shape the development of species' values and qualities. The differences in how parasites and diseases stress people's development is what leads to differences in their biological mate value and mate preferences, as well as differences across culture. Parasites causing diseases pose potential ecological hazards and, subsequently, selection pressures can alter psychological and social behaviours of humans, as well as have an influence on their immune systems.