I frankly was not aware of epigenetic modification. Clearly I should have read what I quoted before I backed myself into a corner. It's a fair point. I would pirouette the point by saying the manner in which your stem cells react to these modifications could be resultant of specific DNA pairings. Indeed anything that goes on in your body is a result of the instructions embedded in DNA right? I will admit my argument is not from a place of expertise. I have a BA in Psychology, not genetics or biology. To me, all this change means is that the resultants of your DNA differences are not always immediately apparent at birth. You still change over time, which I would argue is rooted in your biology, rather than nurture. I don't possess the expertise to fully respond to that point, so I'll take it as such. It could very well be detrimental to my argument.
- - - Updated - - -
Again, let's design an experiment where we have 100 kids and we put 33 in good homes, 33 in bad places and 33 in middle of the road "control" environments and see what happens. Like I said, I can't prove this is true, but you can't prove environment has impact either for the same reasons.
And yes, some people are naturally entrepreneurial, or natural leaders. I would argue there's clearly a leadership gene, which allows you to be more successful than other people.