How did Brahmo Samaj reform Indian society?

Brahmo Samaj reformed Indian society by speaking out against social-evils like sati, child marriage etc. Through education they instilled in the masses that such practices were wrong. Their greatest achievement was the abolition of Sati in 1829.

For further reading check the following articles:

• Raja Ram Mohan Roy
• Bengal Sati Regulation
• Indian Education System During British Rule