I'm genuinely interested in what/where this is, any links / searches?
https://www.google.com/search?q=intelligenc+nature+vs+nurtur...
It's a vigorous and deep debate. Happy reading!
As a pathologist and father, I'm 100% confident there are very good reasons for electing to abort in a variety of circumstances, not all related to the fetus or mother, though there is little reason to rejoice in any of them.
Similarly, I am 100% certain that human development is part genetics, and part environment. But we can't control our genetics. So I don't worry about that much. Maybe there's some fascinating biology discovered every few years, but I can learn good lessons from observing other parents every day.
Maybe that's a good way to frame the environment issue: if you really don't believe environment matters, then ask yourself, should you have kids so you have someone to take your frustrations out on?
The metaphor that comes to mind is this: imagine yourself as a spring, standing upright. In childhood, this spring was held down by a heavy boot. Now that the boot has lifted, what has happened to the spring? Is it back to the original height, or has it stretched even higher?
Keep in mind I'm not saying it's a deterministic inherited thing (it's clearly not). However I believe there is strong evidence that everyone is born with a unique personality and potential. An "environmental chaos theory" does not do justice to unexplained outliers, those with recognized mind-affecting genetic conditions, and many other real-world scenarios.
My situation is even more unusual than you realize. I didn't even meet many people while growing up; throughout my childhood I was almost entirely separated from the outside world (lived secluded in the mountains). Almost no neighbors near by. I never went to public school. Extremely protective parents did not allow us to ever talk to strangers. All this is the same case for my siblings, yet they have no desire to pursue technology, while I do.
Note that by no means am I trying to downplay the importance of environment. I'm simply trying to illustrate that the claim "environment determines 100% of someone's mental and personality development" is empirically wrong.