Which position sometimes attributes the social class differences that can be found in society to innate, biological differences?

The position that sometimes attributes the social class differences that can be found in society to innate, biological differences would be: biological determinism

biological determinism is a set of idea which believe that social class is SOLELY determined by our genetic attributess.
This idea believes that those who are born stronger/smarter are destined to held the higher position and social hierarchy and nothing could change it.

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