Swami Vivekananda , born Narendranath Dutta is the chief disciple of the 19th century mystic Ramakrishna and the founder of Ramakrishna Mission. Vivekananda was the Hindu missionary to the West. He is considered a key figure in the introduction of Vedanta and Yoga in Europe and America and is also credited with raising interfaith awareness, bringing Hinduism to the status of a world religion during the end of 19th Century. Vivekananda is considered to be a major force in the revival of Hinduism in modern India. He is best known for his inspiring speech beginning with "sisters and brothers of America", through which he introduced Hinduism at the Parliament of the World's Religions at Chicago in 1893.
Swami Vivekananda was born in an aristocratic family of Calcutta in 1863. His parents influenced the Swami's thinking—the father by his rational mind and the mother by her religious temperament. From his childhood, he showed inclination towards spirituality and God realization. While searching for a man who could directly demonstrate the reality of God, he came to Ramakrishna and became his disciple. As a guru Ramakrishna taught him Advaita Vedanta and that all religions are true, and service to man was the most effective worship of God. After the death of his Guru, he became a wandering monk touring the Indian subcontinent and getting a first hand account of India's condition. He later sailed to Chicago and represented India as a delegate in the 1893 Parliament of World religions. An eloquent speaker, Vivekananda was invited to several forums in United States and spoke at universities and clubs. He conducted several public and private lectures, disseminating Vedanta, Yoga and Hinduism in America, England and few other countries in Europe. He also established Vedanta societies in America and England. He later sailed back to India and in 1897 he founded the Ramakrishna Math and Mission, a philanthropic and spiritual organization. The Swami is regarded as one of India's foremost nation-builders. His teachings influenced the thinking of other national leaders and philosophers, like Mahatma Gandhi, Jawaharlal Nehru, Subhas Chandra Bose, Aurobindo Ghosh, Radhakrishnan.