Xi Jinping's frequent references to Mao Zedong, along with Xi's own claims to ideological originality, have fueled debate over the significance of Maoism in the PRC today. The discussion recalls an earlier debate, at the height of the Cold War, over the meaning of Maoism itself. This paper revisits that earlier controversy, reflected in arguments between Benjamin Schwartz and Karl Wittfogel, with an eye toward their contemporary relevance.