The history of yoga in the United States begins in the 19th century, with the philosophers Ralph Waldo Emerson and Henry David Thoreau; Emerson's poem "Brahma" states the Hindu philosophy behind yoga. More widespread interest in yoga can be dated to the Hindu leader Vivekananda's visit from India in 1893; he presented yoga as a spiritual path without postures (asanas), very different from modern yoga as exercise. Two other early figures, however, the women's rights advocate Ida C. Craddock and the businessman and occultist Pierre Bernard, created their own interpretations of yoga, based on tantra and oriented to physical pleasure.
The practice of yoga as consisting mainly of physical postures began in 1919 when the pioneer of asana-based yoga, Yogendra, brought his system, influenced by physical culture, to the United States. From 1948, Indra Devi, a pupil of Krishnamacharya, brought yoga to public attention by teaching celebrity pupils in her Hollywood studio. A large variety of asana systems evolved, including the precise Iyengar Yoga and Pattabhi Jois's energetic Ashtanga Vinyasa Yoga and its Power Yoga spinoffs. Spiritual styles also flourished, including Transcendental Meditation and Integral Yoga. Despite this, American yoga has largely detached from its religious roots, becoming part of the cosmopolitan "global popular".[1]