> height is genetic therefore everything is genetic i didn't say that, but how about you answer some simple questions: do you believe that brain size is genetic? do you believe that brain size is associated with intelligence? does average brain size vary by race? > intelligence is complicated so we can't say it's genetic we can say it's at least partially genetic. well, i can anyway. and what proportion is genetic? twin studies suggest the amount is greater than 50%, but you don't know what those are, clearly. and then what other effects are there? parenting style? friendships? community structure? you know these things are affected by genetic predispositon too, right? blacks parent differently from whites, which is consistent with the fact that they differ in particular genes that regulate how children respond to certain types of parenting.
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