Raja Rammohan Roy organized a historic agitation against the evil custom of sati. Sati was a practice in which widows were expected to immolate themselves on their husband`s funeral pyre. Raja Rammohan Roy vigorously campaigned against this practice, considering it inhumane and a violation of women`s rights. He believed that sati was not a true religious practice but rather a social evil that needed to be eradicated. By speaking out against sati and organizing protests, Raja Rammohan Roy played a crucial role in raising awareness about this issue and challenging the prevalent customs and traditions of his time. His efforts ultimately led to the passing of the Bengal Sati Regulation Act in 1829, which outlawed the practice of sati in Bengal.