Why Is It So Hard to Predict the Future?

In Tetlock’s analysis, the foxes—attuned to a wide range of potential sources, willing to admit uncertainty, not devoted to an overarching theory—turned out to be significantly better at predicting future events than the more single-minded experts. The foxes were full spectrum; the hedgehogs were narrowband.

“Who experts were—professional background, status, and so on—made scarcely an iota of difference,” Tetlock concludes. “Nor did what experts thought—whether they were liberals or conservatives, realists or institutionalists, optimists or pessimists.” But “[h]ow experts thought—their style of reasoning—did matter.” The critical variable turned out to