Nov 12, 2009 — What propelled Mao Zhedong to become the biggest mass murderer in world history? Let a professor of Chinese history answer the question. James Pusey (Bucknell U), writing in Nature this week for a series on “Global Darwin,”1 was explaining the vacuum left by the collapse of the reform movement in the early 20th century. A “group of intellectuals” found Marxism attractive. It was the fittest ideology: Many tried to fill it: Sun, Jiang Jieshi (Chiang Kaishek) and, finally, the small group of intellectuals who, in indignation at the betrayal at Versailles, found in Marxism what seemed...