Gaia: the history behind the religion
... thus, it was not a surprise when several nations started to declare that their official religion would be Gaianism. The religion certainly attracted a great share of people, as it seemed that all of them liked to follow some kind of moral rules that would help them to survive in the world...
In spite of what some of the detractors of the religion said, Gaianism was not centered around the Kingdom of Tartessos, although it was true that Tartessos had the biggest share of followers of the religion ever since its inception (nowadays, roughly 30% of Gaians live in Tartessos), which was what probably made people think that absurd idea...
... several sects of Gaianism appeared around the world, the most known one being the Aussi Branch, originated in Jasiran, which would with time expand to Nippon and Koryo, but the original religion of Gaianism was (and is) still the most expanded religion in the world...
... "competition" from other religions like Elvisianity and Beatleism was hardly a thing, as they were only major religions in their countries of origin (the former Florida and Amazonia, respectively), hardly gaining any influence out of them as Gaianism was fairly more attractive and interesting than any other...