What is Swami Vivekananda known for?

Swami Vivekananda is credited with contributing to a revival of modern Hinduism and inspiring nationalist consciousness during colonial rule. He is also known for his famous 1893 speech where he introduced Hinduism to the Western world in Chicago

For further reading check the following articles:

• List of Socio-Religious Movements
• Swami Vivekananda
• Arya Samaj – Dayanand Saraswati