The social system does not and never can exist which allows no harm to come to anybody. Conflict of impulse and desire is an inescapable fact of human existence, and where there is conflict there will always be losers and wounds. Utopian systems premised on a world of loving harmony—communism, for instance—fail because in the attempt to obliterate conflict they obliterate freedom. The chore of a social regime is not to obliterate conflict but to manage it, so as to put it to good use while causing a minimum of hurt and abuse. Liberal systems, although far from perfect, have at least two great advantages: they can channel conflict rather than obliterate it, and they give a certain degree of protection from centrally administered abuse. The liberal intellectual system is no exception. It causes pain to people whose views are criticized, still more to those whose views fail to check out and so are rejected. But there are two important consolations. First, no one gets to run the system to his own advantage or stay in charge for long. Whatever you can do to me, I can do to you. Those who are criticized may give as good as they get. Second, the books are never closed, and the game is never over. Sometimes rejected ideas (continental drift, for one) make sensational comebacks. Kindly Inquisitors: The New Attacks on Free Thought