The economists I know are generally, as individuals, sober and cautious, the most respectable of all professors and in their honesty and reliability representing the best in bourgeois virtue. But when they get together as economists, they give way to boyish irrational exuberance over the accomplishments and prospects of economics as a science. What has happened in the last few months should give them pause. It should make them consider the necessity of looking at economics from the outside, at how it looks and behaves as a whole. There’s no way to do this from within economics–no way to formulate an equation that will correctly predict the failure of equations to predict. The idea of prediction itself has to come into question. Prediction is designed to reduce the role of chance in our lives, eliminating unpleasant surprise and replacing it with gratitude and satisfaction. But somehow it doesn’t have this effect.