In the present work, The Foundations of the Composite Culture in India, the focus of the author is the process of establishment of Hindu-Muslim unity as a result of historical, social and cultural factors over a period of ten centuries. Traversing this era, he reveals how the Muslim rulers contributed such harmony, and how the two cultures exchanged and accepted each other's tenets in order to enrich and formulate a composite Indian culture. With the objective of exploring the foundations on which the composite culture of India rests, the author examines the contribution of Sufism which inherently connotes syncretism and tolerance – as well as the simultaneous rise of the Bhakti movement in medieval India.