I believe that in psychology and evolutionary biology, altruism can be used for a wide variety of pro-social behaviors that are displayed in cases where there i

I believe that in psychology and evolutionary biology, altruism can be used for a wide variety of pro-social behaviors that are displayed in cases where there is no direct benefit to the individual acting. Punishing a murderer who killed someone who is not a family member counts as altruism in that sense. So the Greeks certainly praised altruism in that sense, though there's a lot more to be said than that. One aspect of what you say seems correct. Christianity expanded the circle of the people you owed altruism. (This isn't to speak up for this article, which seems really vague/content-free).