A VOLOKH CONSPIRATOR writes, “I am tempted to go farther and say that for an idea to conquer the world, it usually needs to be a metaphor, or to be presented as one; but this is not the place to develop that possibility.” I agree with him/her (this conspirator is pseudonymous), and would add that for an idea to conquer the world, you must be able to sing about it, in a robust drinking-song kind of way. I developed this theory after listening to an excruciating lecture in college by a guy whose big world-shaping idea was futzing around with the tax rate in order to pay for everyone to go to college. Sing that, I dare you.