Some people might have gone too far in the direction of "nurture" but this guy seems to me that he is going too far on the opposite direction. Of course genetics plays a role, probably a big one, but saying that you can't train your G is just unbelievable to me. If you have poor sleep, poor health, depression, trauma, substance abuse etc... How many G could you gain with behavior therapy ?<br><br>There is no hard limit or border between "nature" and "nurture", they are entangled, they are in fact the same thing. Your genes are the product of your ancestors environment, sheer randomness and the pre natal environment.<br><br>Anyway good talk, I just wanted to hammer the point that genes are important to understand the variance, but so is the environment and our grand grand [...] grand parents environments.