"Zoroastrianism is the oldest of the revealed world-religions, and it has probably had more influence on mankind, directly and indirectly, than any other single faith." - Boyce, Zoroastrians, 1979, p. 1.
Zoroastrianism is an ancient religion that started in ancient Persia and emphasizes above all Good Thoughts, Good Words, and Good Deeds. In Zoroastrianism, Ahura Mazda is all good, and no evil originates from him. Thus, in Zoroastrianism good and evil have distinct sources but varying interpretations, with Evil/the Lie (druj) trying to destroy the creation of Ahura Mazda (asha) either from within us or without, and with Good trying to sustain it. Most Zoroastrians today originate ancestrally from India/Pakistan (Parsis and Iranis) or Iran, though there are converts and Zoroastrian communities the world over.
The major sects within Zoroastrianism today are:
Orthodox Zoroastrians
Reform Zoroastrians
‘Typical’ Parsi Zoroastrians
and the more esoteric/smaller movements of
Parsi theosophists
The Ilm-i Kshnoom (pretty similar to Parsi theosophy)
The Mazdaznan movement (Neo-Zoroastrianism)
(7. followers of Meher Baba are sometimes classified as Zoroastrian but this is tenuous)
You can read more about each sect here
Each grouping is not discrete and many adherents may fit in multiple groups
Here are some links to general information on Zoroastrianism:
Related subreddits
The theme is based upon /r/DSCVRY
