 The dark was not some beautiful thing you went out and explored. It was dangerous. It was something that trapped you. In Paris, at one point, there was actually a law that said every night, everybody has to give their keys to a magistrate, go home, and lock themselves in the house. And for basically 4,000 years, very little happens, with light or with the economy in general. Most people work all day, and that gets them enough to eat.