The last ten years have seen an explosion in the use of behavioral science in fields like economics and public policy—often referred to as “Behavioral Insights.” Public servants, researchers, and others that make use of these approaches have embraced the idea that human beings are not completely “rational,” and that this lack of rationality leads them to make systematic errors in their everyday decision-making, and consequently leaves huge potential for government policy to be more effective if it incorporates a more realistic model of human behavior.It’s a small idea, but one...