Sufi saints came to India in the 11th century and spread their message of devotion and equality. They established khanqahs and belonged to mystical orders called silsilas. The Bhakti movement emerged in South India in the 7th century and challenged the caste system. Saints like the Alvars, Nayanars, Kabir, and Guru Nanak promoted universal brotherhood and opposed idol worship. The Virasaiva movement began in 15th century Karnataka under the leadership of Basavanna and stood against discrimination. All these movements helped promote social reforms through their devotional songs and teachings.