>Twin studies of adult individuals have found a heritability of IQ between 57% and 73% with the most recent studies showing heritability for IQ as high as 80% and 86%.
"Some have gone further, and used height as an example in order to argue that "even highly heritable traits can be strongly manipulated by the environment, so heritability has little if anything to do with controllability.""
Regardless of this, this is a measure if IQ, they control for a similar environment but they don't control for similar upbringing and individual's interests and pursuits.
IQ isn't static, there maybe a static ceiling that differs between individuals but the choices made by parents,individuals and environment affect how much developmental effort is focused on specific IQ traits.
As Einstein put it,you shouldn't measure a fish on it's ability to climb a tree.
Even if it weren't hereditary (although I believe that it's well accepted and uncontroversial that it is), it's still pretty clear that it's innate. Even if intelligence is randomly distributed, I've never heard anybody suggest that intelligence isn't something you're just "born with" whether you got it from your parents or just got really lucky.
Well you just heard me say it. Your thinking capacity is limited and inherited but just like physical muscle devlopment, you can develop it. Women basically have to work out 10x men to have similar muscle development (hormones) but they can develop it. Similarly,you don't just grow muscle because your ancestors had a lot of muscle,you still have to work out. All that I have read about intelligence leads me to believe that while hereditary ceiling differences exist for certain "mental muscles", it is something you develop starting from early stages of life.
"Some have gone further, and used height as an example in order to argue that "even highly heritable traits can be strongly manipulated by the environment, so heritability has little if anything to do with controllability.""
Regardless of this, this is a measure if IQ, they control for a similar environment but they don't control for similar upbringing and individual's interests and pursuits.
IQ isn't static, there maybe a static ceiling that differs between individuals but the choices made by parents,individuals and environment affect how much developmental effort is focused on specific IQ traits.
As Einstein put it,you shouldn't measure a fish on it's ability to climb a tree.