Debiprasad Chattopadhyay (19 November 1918 – 8 May 1993) was an Indian Marxist philosopher. He made contributions to the exploration of the materialist current in ancient Indian philosophy.He is known for Lokayata: A Study in Ancient Indian Materialism, which is his exposition of the philosophy of Lokayata. He is also known for work on history of science and scientific method in ancient India, especially his 1977 book Science and Society in Ancient India on the ancient physicians Charaka and Sushruta. He was awarded the Padma Bhushan, India's third highest civilian honour, posthumously, in 1998.
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