The version of this given in the Alice A Bailey books is certainly the most complex and all-inclusive ! (Other models of the structure of reality are also available - see google)
The Secret Doctrine is a very long book, and there is also the 12 volume Collected Writings of Madame Blavatsky.
This is a survey of the organisations which are active in the UK, and which originate from the Theosophical Society. Most information is drawn from Wikipedia
Theosophy is unusual as it is a complex, extensive and coherent system of thought which is both multi-faceted and multi-leveled. As such, many different methods and angles of approach to it are possible, and it can equally validly be categorised as religious, educational, philosophical or spiritual. The Theosophical Society was founded in 1875 by Madame Blavatsky and others
As this movement has been very influential in terms of modern consciousness, I have written a major section about it This includes its history, some useful theories, some practical techniques, and a description of some of the main offshots
I like the rigour and sense of aesthetics you find in some postmodernism. The origins of postmodernism appear to be completely confused and underdetermined; and perhaps appropriately so, since postmodernism denies the idea of knowable origins. Postmodernism has acquired a semantic instability or a shifting meaning that shadows and echoes its notes of indeterminacy and insecurity.
Some form of Group Consciousness is possible, some element of ‘the whole is greater then the sum of the parts', and that a group of equals can create new patterns and projects of great power. A new synthesis is possible of the best (most useful) bits of all the different schools of thought A new personal centering is possible, with a re-integration of the self around a new centre New potentials can be sensed and reached for the self and for society, new potentials which were always there, but they were previously hidden or difficult to find.
There are many aspects of the Ageless wisdom teachings, and many “schools” of teachings. Generally, I am calling it all “theosophy” (with a small “t” unless it begins a sentence or is part of core teachings of the TS – the Theosophical Society.
I have found an excellent graphic of the family tree of the world religions - many thanks to Simon E Davies, the creator of this.
Many people refer to “the Age of Aquarius” as an astrological epoch, caused by the precession of the equinox from Pisces to Aquarius - the horizon on the first day of spring moves slowly backwards through the zodiac by 30’ (a sign) every 2,000 years. It is unclear exactly when it starts astrologically, and it may take a while before we are fully Aquarian, but there have been several phases of it have occurred already - "theosophy" (the agelesss wisdom) - the new age - post-modernism .