The Milgram experiment goes a long way in explaining the amorality of groups, but I think I have a simpler argument: Even if all people have equally strong con

The Milgram experiment goes a long way in explaining the amorality of groups, but I think I have a simpler argument: Even if all people have equally strong consciences, some of them will worry more about proximate responsibility ("clean hands") and others about ultimate responsibility ("clear conscience"). In other words, some people would be more okay with ordering a man shot as long as they don't have to pull the trigger, and others would be more okay with joining a firing squad as long as they don't give the orders. Once the former start giving orders to the latter, the group will be able to do worse things than any individual member was capable of, but everyone still feels morally okay. To put it yet another way, for each morally questionable task that arises, a large group will probably contain someone who doesn't object to that specific task. Division of labor ensures that group morality sinks to the lowest common denominator.