The golden rule
"Do unto others as you would have them do unto you." (from http://www.princeton.edu/~mdaniels/PD/PD.html)
http://en.wikipedia.org/wiki/Ethic_of_reciprocity
an implementation of this is http://an.org/programming/moral.py.html with a test env / actors having been / being made for it in FoodWorld - idea(?) being that for morality to really show, there needs to be some .. problem, like for example scarcity, in that case food.