Like any animal that evolved to live in groups we have also evolved "morals". Some notions of morality are hard wired into us at such a basic level that people who don't know any better think they're proof of God.
So yes, there is an inherent concept of right and wrong.
I agree with this. I think there is also an aspect of memeplex involved too, e.g. in some cultures it's acceptable to skip ques or get someone in line to get something for you or even not have a queue but just one big crowd.
Also, since there is likely to be a deviation between characteristics within a population, then wrongs/rights between people of the same population will differ as will other between other cultures.
I have a theory in obtaining the best morals: study highly successful and effective organizations. I'm pretty sure they'll have the least amount of cheaters, corruption, highest unity, shared faith, social/mental well being, group defence against the enemy (or competitors), etc, etc. I'm pretty sure this is a debatable, so as I say, just a theory!