I believe everything to do with who we are, and what we become, has completely to do with who raises us. Parents or guardians.
For instants, depending on what religion your parents are will most probably end up becoming your religion (even when most don’t even believe in religion. For instance, even if a person has never been to church in their life, when asked they will say Christian, because that’s that their parents were!)
If you’re parents smoke, your most likely end up smoking.
At an early age our brains are like sponges, to say that we don’t copy the personality trait of our family is impossible.
How are parents speak, so do we. If they are polite, so are we. If they swear like State-Troopers so do we (of course they blame it on school, not thinking for one minute that their obscenities are the reason we talk the same!)
Of course just a bigger factor to our growing minds and attitudes has to do with WHERE we are born! If born in Indian your more likely to be a Hindu or have a varied choice in religion and beliefs. If your born in England, your most probably Church of England (even if you have never been!) If your in America, then could be anything.
Everything about who we are (even if we wouldn’t admit it) stems from are heritage and location.