This book provides a comprehensive account on the doctrines of the Andhakas, an early Buddhist sect. It explores how cosmopolitan character of Buddhism is nurtured by the Andhakas. Moreover, it shares key insights into the coherent system of Buddhist philosophical doctrines of the Andhakas on the basis of the Kathāvatthu, enabling readers to gain a better understanding of the doctrinal developments that took place during this period. Divided into four chapters, the book offers broad coverage of the Andhakas, making it of interest to researchers focusing on early Buddhism, as well as general readers who want to learn more about Buddhist philosophy and studies on Andhra.