Recently, I was trying to remember the water brother ceremony from Robert A. Heinlein’s novel Stranger in a Strange Land (pub. 1961) and googled ‘Water Communion’ and was interested to see that is a practice in the UUA, started in 1980. Stranger in a Strange Land is a very spiritual book (the central message of which—or at least the message of the protagonist if not the author—is ‘Thou art god’) about which had an enormous influence on new age and ‘hippie’ (meant without pejorative) culture, and one of the central features is the ceremony of sharing the water of life (ie just water) , which establishes brotherhood (a term explicitly glossed in the book as being without gender due to the Martian language—one of the first water brothers of the protagonist is a woman). In other words, it’s plausible that people interested in the UUA would be reading and influenced by this book.

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However, sharing water is hardly unique to Heinlein, and I don’t know anything about the history of Water Communion in the UUA beyond a cursory googling. Does anyone know if those who created the practice were inspired by Stranger in a Strange Land? Or is it just one of those coincidences, perhaps the two being cousins influenced by the same longer traditions about water?