This book offers a picture of madness as a category and a tool in the early Chinese tradition, giving an account of how early Chinese thinkers developed a conception of mental illness connected to both medicine and ethics, particularly in the Warring States and Han periods. Specifically, it is concerned with the connections between madness, mental illness in general, and philosophical positions on personhood, moral agency, responsibility, and social identity. Madness is a near universal category in human thought. In early China, madness (kuang ?) has particular unique forms, shaped through consideration of the features of mind and body, cultural norms, and illness and health. While madness and other forms of mental illness were taken as either foils or ideals by different thinkers in early China, they were nearly always contrasted with operability, proper communal development, and progress on a specifically moral path. This book explores these conceptions of madness in early Chinese thought.