Why are hawks so influential? The answer may lie deep in the human mind. People have dozens of decision-making biases, and almost all favor conflict rather than concession. A look at why the tough guys win more than they should.
Social and cognitive psychologists have identified a number of predictable errors (psychologists call them biases) in the ways that humans judge situations and evaluate risks. Biases have been documented both in the laboratory and in the real world, mostly in situations that have no connection to international politics. For example, people are prone to exaggerating their strengths: About 80 percent of us believe that our driving skills are better than average. In situations of potential conflict, the same optimistic bias makes politicians and generals receptive to advisors who offer highly favorable estimates of the outcomes of war. Such a predisposition, often shared by leaders on both sides of a conflict, is likely to produce a disaster. And this is not an isolated example.
In fact, when we constructed a list of the biases uncovered in 40 years of psychological research, we were startled by what we found: All the biases in our list favor hawks. These psychological impulses — only a few of which we discuss here — incline national leaders to exaggerate the evil intentions of adversaries, to misjudge how adversaries perceive them, to be overly sanguine when hostilities start, and overly reluctant to make necessary concessions in negotiations. In short, these biases have the effect of making wars more likely to begin and more difficult to end.
None of this means that hawks are always wrong. One need only recall the debates between British hawks and doves before World War II to remember that doves can easily find themselves on the wrong side of history. More generally, there are some strong arguments for deliberately instituting a hawkish bias. It is perfectly reasonable, for example, to demand far more than a 50-50 chance of being right before we accept the promises of a dangerous adversary. The biases that we have examined, however, operate over and beyond such rules of prudence and are not the product of thoughtful consideration. Our conclusion is not that hawkish advisors are necessarily wrong, only that they are likely to be more persuasive than they deserve to be.