You don't think manipulation, greed, and hunger for power are natural consequences of our brain and biology being set up the way it is?
What simple experiment can disprove the hundreds of double-blind studies separating nature from nurture?
manipulation
I think the social constructs we immerse our children in take this to the extreme in their minds. I do not think it is natural for our society to use manipulative behavior quite so much.
greed
No. The greedy will forever abuse those who are not. I don't pretend this is not a part of the human condition.
hunger for power
This is another iffy one. Pretty sure this is made a bajillion times worse by the shit society we pretend is invaluable. Celebrating single motherhood/fatherhood as if it were something to aspire to, pressing "the issues" like idiotic first world problems while hundreds of thousands starve annually in a single nation, and ignoring the obvious schemes of the oligarch which will eventually send many of our children to a pointless death.
Circumsision and corporal punishment are still perfectly acceptable behavior in first world countries. Public schools are basically propaganda hubs disguised as places of learning. I could bitch about this stuff all day. Its no wonder children are shell shocked, then often grow up to be mean spirited or power hungry adults.
I mention children more than once because they'd be the only hope of reversing a lot of this damage. Prior generations are too far gone.