I think they most definitely can be taught. Whether an individual chooses to learn these things and/or put them into practise, I think is a different thing.
I don't know that I would hold a lot to how we are parented - which, yes, I believe makes an impact - but every person comes to a time/age when they must choose for themselves what they believe, how to behave, what they value, etc. Again, it is that all-powerful individual "choice".