@IWFBuckley @JayMan471 let's take parenting. In general it looks like parenting variation within the normal range does not cause major
@IWFBuckley do you mean 20% environment? On an individual basis, the heritability of IQ is 60-85%, with the remainder mostly random
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@IWFBuckley randomness isn't causing broad differences in crime rates, but environment probably is 20% or so. Sure
Thanks. Twitter will use this to make your timeline better. UndoUndo
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@IWFBuckley on a group basis, like the black-white test score gap, my guess is it's over 90% genetic plus just a little environment.
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@IWFBuckley Most randomness averages out.
End of conversation
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