I saw an interesting study of universal morality linked to by Mano Singham of Freethought Blogs.
They identify 7 traits that seem to be common among all societies, not just WEIRD (western, educated, industrialized, rich, democratic) ones.
They list helping kin, helping your group, reciprocating, being brave, deferring to superiors, dividing disputed resources, and respecting prior possession.

Singham describes it as an ethnographic study done by Oliver Scott Curry, Daniel Austin Mullins, and Harvey Whitehouse based on non-zero sum game theory of 60 different cultures. I'll add that they are at the Institute of Cognitive and Evolutionary Anthropology, University of Oxford (Oxford, United Kingdom).