a person who believes that differences between individuals or groups, including moral and intellectual attributes, are predominantly determined by genetic factors (opposed to environmentalist ).
characteristic of or based on such belief: hereditarian theories.

1880–85; heredit(y) or heredit(ary) + -arian

hereditarianism, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The hereditarian and environmentalist positions are described.
It is shown to be totally spurious, based on hereditarian doctrines long in disrepute, and dangerous in use.
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