millgram? >> yes. they tried to rationalize. deny that they really did as much as they did. they used various kinds of psychological defenses to in effect convince themselves, not us, but to convince themselves that they really hadn't done anything bad. >> yeah, i guess that's a good point. the psychological trauma even to the person who is administering the shocks could be significant. here's how stanley millgram himself summed it up. take a listen. >> the results, as i observe them in the laboratory, are disturbing. they raise the possibility that human nature cannot be counted on to insulate man from brutality and inhumane treatment at the direction of authority. >> a lot of people who concluded do what they're told if they perceive the command comes from a legitimate authority. if a person they never met before can convince them to subdue a 50-year-old man with pain and shocks against his protest. what do you think that this experiment taught us about ourselves as a society? >> well, what it taught us essentially was in the