On World Philosophy Day, Amar Chitra Katha brings you Great Thinkers of India, a collection of our existing titles Adi Shankara, Ramana Maharshi, Sri Ramakrishna, Vivekananda and Manik Prabhu. These philosophers led by their actions and have touched countless lives with their single-minded pursuit of the greater good. The stories of these thinkers became their lessons that live on to educate the world about the need for oneness among humanity and selfless service to one another.