Chen Hansheng was not only a pioneer of modern Chinese social science, remembered for the village studies he organized by teams of researchers in the 1930s. He was also a political operative whose career as an underground and aboveground Communist activist spanned the twentieth century and the globe. This book draws on unique interviews, beginning in 1979, with Chen himself, his family and associates, along with an exhaustive examination of documents, writings, and archives, to build a rounded portrait of Chen, the man, and his world.