Atmiya Sabha (or Society of Friends), 1814 was set up by Raja Rammohan Roy in Calcutta to propagate the monotheistic ideals of the Vedanta and to campaign against idolatry, caste rigidities, meaningless rituals and other social ills.
Strongly influenced by rationalist ideas, he declared that Vedanta is based on reason and that, if reason demanded it, even a departure from the scriptures is justified. He actively opposed Sati system and the practice of polygamy
Atmiya Sabha