This book is the first full-length English-language study to explore the struggles for constitutional democracy and democratic socialism of Zhang Junmai [Carsun Chang, 1887-1969], a major political and intellectual figure in Republican China. Focusing on Zhang's writings, Roger Jeans has provided detailed descriptions and extensive translations of Zhang's key books and essays. He sets the context for these seminal works by describing Zhang's personal situation, the social and intellectual milieu, and the political climate at the time. This study will be useful to all readers interested in the history of the concepts of constitutionalism, human rights, and democracy as they have developed in China.