This article is about the philosophy introduced by Helena Blavatsky and the Theosophical Society

Theosophical Society

The Theosophical Society is an organization formed in 1875 to advance the spiritual principles and search for Truth known as Theosophy. The original organization, after splits and realignments has several successors...

. See Theosophy (history of philosophy)

Theosophy (history of philosophy)

Theosophy , designates several bodies of ideas since Late Antiquity. The Greek term is attested on magical papyri .-Neoplatonism:...

 for other uses.

Theosophy, in its modern presentation, is a spiritual philosophy

Spiritual philosophy

Spiritual philosophy is a generic term for any philosophy or teaching that pertains to spirituality and spiritual realities. It may incorporate religious or esoteric themes, especially those from Theosophy or Neo-Theosophy, New Age thought, mysticism, and Eastern philosophy...

 developed since the late 19th century. Its major themes were originally described mainly (though not exclusively) by Helena Blavatsky (1831–91), co-founder of the Theosophical Society

Theosophical Society

The Theosophical Society is an organization formed in 1875 to advance the spiritual principles and search for Truth known as Theosophy. The original organization, after splits and realignments has several successors...

. Blavatsky's sprawling magnum opus

Magnum opus

Magnum opus , from the Latin meaning "great work", refers to the largest, and perhaps the best, greatest, most popular, or most renowned achievement of a writer, artist, or composer.-Related terms:Sometimes the term magnum opus is used to refer to simply "a great work" rather than "the...

, published in 1888 as The Secret Doctrine

The Secret Doctrine

The Secret Doctrine, the Synthesis of Science, Religion and Philosophy, a book originally published as two volumes in 1888, is Helena P. Blavatsky's magnum opus. The first volume is named Cosmogenesis, the second Anthropogenesis...

, is considered to be the major foundational work of modern Theosophy.

Contemporaries of Blavatsky as well as later theosophists also contributed to the development of Theosophy, producing works that at times expanded on the original concepts.