What are your takes on the Perennial Philosophy, as SuttaCentral users and contributors, related to Buddhadharma and/or EBTs?
There are genres of religion, which probably refutes Perennialism.
Primitive people believed in animism, since their lives were devoted to physical survival.
Tribal religions, with tribal gods affirming the tribe (e.g. Judaism, Brahmanism).
Hierarchical societies with God-kings or devas (e.g., Egyptian; Babylonian; Tibetan; etc)
Moral religions of social moral law (e.g. Islam).
Liberation paths (Buddhism; Christianity).
Buddhism is the Perennial of beyond the world (lokuttara) liberation. Christianity is an imitation. MN 115 states there can be only one Buddha in a world-system.
Isn’t Christianity more close to Hinduism?
For one take on the topic see
"Buddhist Romanticism" (2015), by Thanissaro Bhikkhu
Chapter “The Transmission of Romantic Religion”,
subheading “Perennial Philosophy” (about 16 pages)
( p 223 in this version (page nos vary between printed and digital versions): http://www.dhammatalks.org/Archive/Writings/BuddhistRomanticism151231.pdf )
I would say it is liberation via loving-kindness (per MN 43) or Buddhist-Brahmanism (per DN 13).
My personal take is a fairly conventional one, I guess, which is that the perennial philosophy is most closely aligned with Advaita Vedanta, and hence subject to the Buddhist critiques of that. However I have never studied it in any detail.