[Aliantha]

There's plenty of evidence to suggest pretty much any side of this multi-sided argument.

There's no doubt peers have a profound effect on the thoughts and habits of the group.

There's also no doubt that different styles of parenting effect a childs world view.

There's also no doubt that genetics play a big role too.

The thing there is doubt about is how much influence each of these factors have.

I would say that research suggests that the answer is, it depends on what stage of life the child/young adult is at.