In Part 1 (link below), I argued that the House of Representatives was designed to grow. For most of American history, it did. Then, in 1929, Congress froze the House at 435 seats. It has remained there ever since. Part 2 asks a different question: If the House is supposed to grow, how large should it be? At first, I thought the answer might have something to do with human nature. Maybe there was something buried deep in our DNA — some limit on how many people we can know, trust, manage, or represent. I was wrong. The deeper I...