Reality is not so dichotomized. Human choices are influenced by both nature and nurture (i.e. environment). In psychobiology, I believe the consensus is that nurture contributes at least 50% to personality development and consequently propensity for certain choices and behavior. If inherent nature can't be changed, how could have the environment been different, to change the outcome? That was what I got from the parent comment.
By the way, if we're talking about "fundamental" qualities of a person -- from a biological standpoint, there is some evidence for a genetic propensity toward 'good' (e.g. altruism) or 'bad' (e.g. violent) behavior. But the vast majority of people land somewhere in the middle.
By the way, if we're talking about "fundamental" qualities of a person -- from a biological standpoint, there is some evidence for a genetic propensity toward 'good' (e.g. altruism) or 'bad' (e.g. violent) behavior. But the vast majority of people land somewhere in the middle.