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Culture vs Nurture.

Right is explained with nurture, then biological facts have more weight in their explanations.

Left is explained with culture, then cultural facts have more weight.

Anti-femenism, anti-gay, racism, competitiveness... all are explained with biological facts.

Did you mean "nature vs. nurture?" Culture and nurture would be of the same kind (nurture causes culture).

If you are making the distinction of "biology" vs. "sociology" then the biological side is commonly referred to as "nature."