The History of Buddhism starting with the birth of the Buddha Siddhartha Gautama. This makes it one of the oldest religions practiced today. Throughout this period, the religion evolved as it encountered various countries and cultures, adding to its original Indian foundation Hellenistic as well as Central Asian, East Asian, and Southeast Asian cultural elements. In the process, its geographical extent became considerable so as to affect at one time or another most of the Asian continent. The history of Buddhism is also characterized by the development of numerous movements and schisms, foremost among them the Theravada, Mahayana and Vajrayana traditions, punctuated by contrasting periods of expansion and retreat. Each chapter in the book is self contained and is consistent with the general aim of the book. No doubt, the chapters given in this book shall help the teachers, students and social scientists to understand and explore more in the subject.