This book provides a comprehensive overview of the development of philosophical thought in India from the Vedic period to the early centuries of the Common Era. S.N. Dasgupta meticulously traces the evolution of diverse philosophical schools, including Nyaya, Vaisheshika, Samkhya, Yoga, and others, offering insights into their key tenets and contributions. His scholarly approach and deep understanding of the subject have made this volume an essential reference for students, scholars, and enthusiasts of Indian philosophy worldwide