Abstract

It’s often claimed that some people—fundamentalists or fanatics—are indeed sealed off from rational criticism. And every month new pop psychology books appear, describing the dumb ways ordinary people make decisions, as revealed by psychological experiments. The conclusion is that all or most people are fundamentally irrational. Ray Scott Percival sets out to demolish the whole notion of the closed mind and of human irrationality. There is a difference between making mistakes and being irrational. Though humans are prone to mistakes, they remain rational. In fact, making mistakes is a sign of rationality: a totally non-rational entity could not make a mistake. Rationality does not mean absence of error; it means the possibility of correcting error in the light of criticism. In this sense, all human beliefs are rational: they are all vulnerable to being abandoned when shown to be faulty. Percival agrees that people cling stubbornly to their beliefs, but he maintains, first, that not being too ready to abandon one’s beliefs is rational, and second, that people do not cling to their beliefs indefinitely or “come what may.” The illusion that they do can be dispelled by examining what really goes on in the formation and abandonment of beliefs, and here we need to observe the high rate of turnover in membership of ideological movements, as well as their numerous splits and schisms. Percival examines and refutes the arguments of writers who have upheld the Irrationality or Closed Mind thesis, including Raymond Boudon, Serge Chakotin, Richard Dawkins, Jon Elster, Ernest Gellner, Adolf Hitler, Leszek Kolakowski, Walter Laqueur, Gustav Le Bon, Karl Popper, and Max Weber. A key aspect of Percival’s approach is to identify “the persuader’s predicament,” the situational logic of the propagandist. Percival contends that a propagandist is faced with a trade-off between his message being closed to criticism and the message reaching and converting as many people as possible. It is possible to make a belief system more closed to criticism, but only by limiting the wide dissemination of the system. Percival illustrates the way belief systems adapt to criticism by an examination of two ideologies, Marxism and Freudianism, and by various examples drawn from the history of religion.