The book is fairly a comprehensive study of the Social Philosophy of Swami Vivekananda,who is hailed today as a prophet of human emanciaption in many areas of the world.The author shows,Vivekananda'Social Philosohy based on Vedanta (recognised by many as the background philosophy of modern Science) contains a revolutionary concept of "Man", a revolutionary concept of "Religion" and a revolutionary concept of "Revolution" itself.In formulating his social theories the author further shows,the master-mind has given first homage to "history", "Reason" and "Science". An analysis of his socialogical, historical, political and economic ideas and an assessment of his plan,his instrument for social revolution, his impact on the socialist countries and of his role in the socio-economic and cultural transformationsin modern India,have also been attempted.The epilogue shows that the keynote of Vivekanandfa's social philosophy is dynamic activism.