“It is a law of human nature,” David Brooks writes in his newest book The Social Animal, “that the more men you concentrate in one happy pack, the more each of them will come to resemble Donald Trump. They possess a sort of masculine photosynthesis to start with — the ability to turn sunlight into self-admiration. By the law of compound egotism, they create this self-reinforcing vortex of smugness, which brings out the most-pleased-with-themselves aspects of their own personalities.”