Swami Vivekananda (1863–1902), born Narendranath Datta, was a dynamic spiritual leader, philosopher, and disciple of Sri Ramakrishna Paramahamsa. He introduced Indian Vedanta and Yoga to the Western world at the Parliament of the World’s Religions in Chicago in 1893. He emphasised the unity of all religions, strength of character, and practical spirituality. Through his powerful speeches and writings, he revived national pride, promoted social service, and laid the foundation for the Ramakrishna Mission, making Hindu spiritual thought globally relevant.