People are inherently capable of good or evil, it has nothing to do with how you are born. Man has capacity for both, and I find that using terms such as 'good' and 'evil' is inaccuarate and to some degree incorrect. There is no such thing as good, and there is no such thing as evil, because we cannot see the entire picture, and can therefore not make such a judgement. These are only terms coined by us to simplify a rather complex notion. Put simply, good and evil are only points of view - subjective, not objective, and should, due to that, not be ratified as such.
Edit: One can make assumptions based on morals, but I find that it's hard to say what is right and what is wrong. Are your morals better than mine? Who are you to be the judge of that? All these aspects of philosophy (moral philosophy) are in my opinion void, because they fail to distinguish between the subjective and the objective, as mentioned in my post. Some tribes in the Amazon forest cannibalize their dead (soup, to be precise, or so I have been told). While we find this somewhat disgusting based on our morals, they find it perfectly natural, and might even find it strange or scandalous that we bury our dead.