Norman Mailer interviewed by William F. Buckley Jr., on a 1968 episode of Firing Line: "There's such a thing as a great cop, and there's such a thing as a great criminal. And the way I work -- it's very hard to explain this to people -- I don't think in categories, I think, rather, in this way: that the world is better off if every so-called type in the world, is better. It's a better world if the cops get better and the criminals get better. It's a poorer world when the cops are dull and the criminals are dull. In other words, as an existentialist what I believe is that what really is important in the world is how much life there is, how much psychic life, how much spiritual life, how much physical life, imagination, vitality, brilliance. I'm not going to carry this into every ridiculous extreme, but: you know, a mass murderer is not necessarily a criminal. One of the best remarks that Marx ever made -- or maybe this was Engels, in fact -- is that quantity changes quality. You see, a man who kills one man may be moral or immoral; we can't know, we need to know intimately what happened. Generally, the assumption is that he was immoral. Greivously immoral. At the very least, we know that he has changed his life profoundly, and that he has now (if you believe in a mortal soul, as I do, which you can gain or lose) so endangered his soul that we cannot look upon his condition as a light one. I would not presume to judge him too quickly. A man who murders four or five people is already a man of a totally different sort. A man who murders millions is a man who defies our conception of what it is to be a man. And so, for that reason, I would be perfectly willing to let my hypothesis dwindle and die long before we get to the man who kills three or four people. You see, we have to have a little wit when we speak of these matters ... Once, a philosopher; twice, a pervert. That's the key to keep in mind. That's Voltaire."