My veiw is like Aristotle's cave allegory-
Those of us who are educated and enlightend (reached the truth in some way) have a duty to society so go back and help others who have not been educated or enlightend.
This had to do with people as a whole > individual philosphy at the time, but I think it reigns true. Society will run better when all it's members are smarter, richer, healthier and are educated and able to make a difference in their communities.
People who are more fortunate wether in education, resources, or money have a duty to try to help those who do not have these things.