human nature is not black and white, it's black and grey

What people are now is very different from what they were before about 10,000 years ago, when agriculture emerged. Before then, humanity lived more as part of the natural world, taking only what was necessary by gathering easily-had foodstuffs and increasing their protein intake by hunting.
Although any evidence does not definitely solve the puzzle of human nature, it does give us evidence we may use to solve this puzzle for ourselves—and our solutions will likely vary according to how we define “human nature.” If human nature is something we must be born with, then we may be neither good nor bad, cooperative nor selfish. But if human nature is simply the way we tend to act based on our intuitive and automatic impulses, then it seems that we are an overwhelmingly cooperative species, willing to give for the good of the group even when it comes at our own personal expense.