Everyone who came in close contact with Mao was taken aback at the anarchy of his personal ways. He ate idiosyncratically. He became increasingly sexually promiscuous as he aged. He would stay up much of the night, sleep during much of the day, and at times he would postpone sleep, remaining awake for thirty-six hours or more, until tension and exhaustion overcame him. Yet many people who met Mao came away deeply impressed by his intellectual reach, originality, style of power-within-simplicity, kindness toward low-level staff members, and the aura of respect that surrounded him at the top of...