We can say everyone is born with some inherent abilities that are standard to all human beings; and we are talking in general terms here, because someone might say, "well then what about pre-matured or deformed babies or autistic children?"
What really matters is the way we are raised, the life that we live, the people we come across our lives and our experiences. Take yourself as an example. Do you think you would be the same person right now, asking this question on HUB if you were born in a Masai warrior tribe? Most probably you would have been a hunter.
This will really stretch some people's imagination, because you might ask, how could it be possible for me to be born in an African tribe? Well did someone ask you where you wanted to be born?
There are things, which are realms of unknown and talking about them is like trying to kill a Dinosaur, throwing arrows in the dark, with closed eyes and wearing a blind-fold, not even sure if you are facing East or West.
But we can talk about the exposures, which really leaves impressions and moulds a child from day one. There are too many variables involved here and too many factors. Parents are the first and most important factor, which plays a part in a person's upbringing. The parent's mental capacity then onwards decides if he is going to be put in a derelict Public School, left to be conditioned by the incompetent wardens or given a better chance at life.
I guess that's why it was said that every child is born on nature and then their parents make him whatever they end up being (except those who cannot be brain-washed and coerced at all). Now for the exceptions we can say that, it was an inherent natural born ability of a child that prohibited him/her from accepting blindly all the wrong decisions of a parent, teacher, society, culture, etc.
Take a look at large families as an example. How come two people are born in the same environment, go through the same schooling, have same parents, but end up having different outlook on life. One may end up accepting everything blindly, while the other ends up poles apart.
We can say that the nature of a person and the environment that one goes through runs parallel. We can never pin-point such things to a tea, to the exclusion of the other. They both together make up the whole.