Researchers have found that devil's advocates provide numerous benefits, the primary one being that they prevent "group-think." Cass Sunstein ("Why Societies Need Dissent"), for instance, has shown that juries are more likely to reach reasonable decisions, social investment clubs are more profitable, and religious groups are less likely to radicalize if they include members who are unafraid to (and not prevented from) embrace a minority position. I recently drew on Sunstein's theory in order to explain the radicalization of the Hamburg Cell, the members of which played a major role in 9/11 ("Social Networks and Religious Violence").
All of this came to mind when some have wondered why Senator John McCain thinks that a free press is a good thing, even if it is sometimes an adversarial press. I don't know whether McCain has read Sunstein (or perhaps me?), but I suspect that he intuitively knows (as did the framers of the U.S. Constitution) that a healthy democracy is one that not only permits dissent but encourages it. Democracies need individuals and institutions that challenge the accepted wisdom for the simple fact that the accepted wisdom is sometimes dead wrong. What they say or write may upset us, and their critiques may turn out to be incorrect (they often are), but we still need such critiques, at least if we still want to live in a democracy, which is why (as McCain pointed out) the press is often one of the first things that authoritarian governments target.
All of this came to mind when some have wondered why Senator John McCain thinks that a free press is a good thing, even if it is sometimes an adversarial press. I don't know whether McCain has read Sunstein (or perhaps me?), but I suspect that he intuitively knows (as did the framers of the U.S. Constitution) that a healthy democracy is one that not only permits dissent but encourages it. Democracies need individuals and institutions that challenge the accepted wisdom for the simple fact that the accepted wisdom is sometimes dead wrong. What they say or write may upset us, and their critiques may turn out to be incorrect (they often are), but we still need such critiques, at least if we still want to live in a democracy, which is why (as McCain pointed out) the press is often one of the first things that authoritarian governments target.