Rajaram Mohan Roy was a key figure in the Indian renaissance who fought against social evils like sati and child marriage. He founded the Brahmo Samaj in 1828 to promote social reform based on Hindu scriptures and rational thinking. Roy campaigned to abolish sati and pushed for modern education in India by establishing schools that taught both Western sciences and Indian texts. He is considered the father of the Indian renaissance for introducing reforms that modernized Indian society in the 18th and 19th centuries.