Son, you’re eight years old now, and you’ll probably hear this soon enough from the other kids on the playground anyway, so I might as well tell you. Santa isn’t real, the Tooth Fairy is imaginary, and there’s no such thing as the “invisible hand of the market.” Why did your mother and I lie to you? Well, we didn’t so much lie to you as tell you stories that were untrue, stories that we hoped would add magic to your childhood and also reassure you that capitalism is a good and fair system for everyone, instead of one in...