Helena Petrovna Blavatsky (1831–1891) was one of the most remarkable and most controversial figures of the 19th century. Born in Russia into an aristocratic family, she spent decades travelling — through the Middle East, India, Tibet (allegedly), Europe and America — before co-founding the Theosophical Society in New York in 1875 with the American journalist and lawyer Henry Steel Olcott.
Blavatsky claimed two sources of authority for her teaching: direct contact with a Brotherhood of Masters (Mahatmas — great souls) in Tibet who had preserved the ancient wisdom tradition through the centuries, and her own clairvoyant access to the Akashic Record — a cosmic repository of all knowledge. Her major works — Isis Unveiled (1877) and The Secret Doctrine (1888) — drew on these claimed sources together with an extraordinarily wide reading in comparative religion, mythology, science and occultism.
The Theosophical Society's three declared objects capture its ambition: to form a nucleus of the Universal Brotherhood of Humanity without distinction of race, creed, sex, caste or colour; to encourage the comparative study of religion, philosophy and science; and to investigate unexplained laws of nature and the powers latent in humanity. These objects — broad, inclusive, intellectually serious — attracted scientists, artists, writers and spiritual seekers across the world.