The United Lodge of Theosophists or ULT is an informal and wholly voluntary association of students of Theosophy. It was founded in 1909, mainly through the efforts of Robert Crosbie. The first parent lodge of the ULT was started in Los Angeles by Robert Crosbie and seven other associates through the adoption of its Declaration on February 18, 1909. Owing largely to the revival efforts of B.P. Wadia  after Crosbie's death, there are currently about twenty active lodges spread all over the world. The ULT is considered to be part of the second generation  or the third section  of the Theosophical Movement started in 1875 by H.P. Blavatsky in New York. Presently, it is also one of the existing four main "branches" of the original Theosophical Movement. The following founding principles  when taken as a whole, sets apart the ULT from the other Theosophical Organizations:
ULT Los Angeles publishes the Theosophy Magazine which was started by Robert Crosbie in 1912. It was the revival of an earlier periodical called The Path that was edited by W.Q. Judge. ULT India publishes the Theosophical Movement Magazine, founded under B.P. Wadia in 1930 in Mumbai. ULT Santa Barbara publishes a quarterly periodical called Vidya, and uses Concord Grove Press to publish theosophical texts including a pamphlet series on themes from The Secret Doctrine. The Theosophy Company was registered in 1925 on behalf of ULT as a fiduciary agent  and an eleemosynary, non-profit corporation to publish photographic facsimile of the Original Editions of books by H.P. Blavatsky and W.Q. Judge.
The history of ULT began with Robert Crosbie coming in contact with H.P. Blavatsky in 1887 and his subsequent association with the Theosophical Society or TS in Boston. Based on H.P. Blavatsky's instructions, he placed himself under the direct guidance of W.Q. Judge. Following the death of the original founders of the movement, Robert Crosbie was witness to the ensuing rivalries around "leadership", "authority" and "succession" surrounding Katherine Tingley, who headed the American section and Annie Besant, who headed the international section from India. Initially, Robert Crosbie gave his support to Katherine Tingley and went to Point Loma in 1900 to be of assistance there. However, by 1904, he felt the original teachings of Theosophy were almost completely eclipsed by Katherine Tingley's sensational programs. Convinced that further effort was futile, he quietly left Point Loma and moved to Los Angeles. By February 1909, he had gathered around him seven individuals as part of a study group, four of whom were new to Theosophy. This nucleus, under Robert Crosbie's guidance, set to the task of restoring Theosophy along the original lines of its founders without organizational distractions. In the meantime, the original 1888 version of The Secret Doctrine was out of print and replaced by Annie Besant's "Third and Revised Edition". This edition was found to contain tens of thousands of alterations and major distortions. This and other material that diverged significantly from H.P. Blavatsky's original presentation was denominated Neo-Theosophy. Robert Crosbie denounced Neo-Theosophy and considered it along with other leadership claims and rivalries in the Theosophical Society to be the result of the accentuation of personality, in the Theosophical sense of the lower or illusionary self. Hence the Declaration of the ULT was drawn to emphasize an impersonal, self-reliant, non-hierarchical, non-organizational spirit and loyalty to the original founders and their unaltered message.
In November 1919, five months after Robert Crosbie's death, B.P Wadia, a predominant member of the Theosophical Society Adyar visited America and happened to come across ULT Los Angeles. There he discovered the works of W.Q. Judge who was considered a renegade by the Theosophical Society under Annie Besant and Col. Olcott. Furthermore, he found the reformation he was seeking of the Theosophical Society in ULT's Declaration of purpose and its mission of "pure Theosophy" without organizational distractions. He then went back to India with the hope of changing the attitude of the leaders of the Theosophical Society, to return to the original teachings, set right the wrong that was done to W.Q. Judge and mend the schism in the Theosophical Movement. Finding that his efforts were unsuccessful, he resigned from the Theosophical Society on 18 July 1922  and joined the ULT. Between 1922 and 1928, he stayed in America and founded ULT lodges in New York, Washington D.C., and Philadelphia. And on his return trip to India via Europe, he established ULT lodges in Antwerp, Amsterdam, London, and Paris. Back in India, he started ULT lodges in Mumbai and Bengaluru.
The first ULT lodge founded in 1909 by Robert Crosbie :
Founded between 1923 and 1928 under the guidance of B.P Wadia during his stay in America :
Established in 1928 during B.P Wadia's journey from America back to India via Europe:
First ULT lodge in India, opened on November 17, 1929 under B.P Wadia's leadership:
A sister lodge of the Mumbai center started in 1938 under B.P Wadia:
Named "Maitri Bhavan", this lodge was started on the 12th of August 1942 by B.P Wadia:
Study centers started organically by students: