Which activities did the Arya Samaj do for society?

The Arya Samaj had worked to further female education and intercaste marriage; had built missions, orphanages, and homes for widows; established a network of schools and colleges; and also undertook famine relief and medical work.

For further reading check the following articles:

• List of Socio-Religious Movements
• Dayananda Saraswati – Arya Samaj
• Indian Education System During British Rule