Our world is full of Chesterton Fences: objects, institutions, and rituals apparently inefficient and yet effective. For example, in his book “Alchemy", Rory Sutherland explains how London taxi drivers have to spend years memorizing every single street. This seems useless and inefficient, especially in the age of GPS navigation. And yet, it has its use: it is an upfront cost designed to weed out unmotivated candidates who might later provide a degrading service. Chesterton's Fence