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> I feel like we must have done enough twin studies over the years at this point to conclusively say that genetic heritage is the most significant factor for a whole host of ourcomes.

I feel like there wouldn't be so much discussion still if we had. I'm no expert, but as far as I'm aware the debate is still ongoing for a lot of areas. Epigenetics are also a big factor for consideration.

> Environmental factors are alluring, because they offer the potential that something can be done, through toil and good works, to achieve improvements, rather than the more Calvinist tyranny of genetics.

I think it's also we've just learned from history. People believing they're intrinsically better than others has led to genocide, the mass destruction of cultures, regression and problems that are still felt all over the world today.




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