The Baha’i Faith got smashed with incredible persecution and genocide. In the east, it’s still dangerous to be a Baha’i. However, the structure of the Faith is to spread it in a gentle way over whatever place you can. Members are encouraged to travel internationally and do what is essentially missionary work to help show the world what Baha’is believe. In those places the stories and songs are spread at “firesides” not by keeping it all in a religious building somewhere (although there are places of worship, it’s not where or how the Faith is spread). The Baha’i Faith is one of worlds most rapidly growing religions after only developing in the last 300 years. I think what most successful religions have in common, is that they build on an established religions existing beliefs and by doing it gently. The Baha’i Faith is an Abrahamic religion, building directly on from established Abrahamic religions with the belief that all of the world’s religions actually worship the same God. Edit: it also helps that the laws of the religion are to set aside some money for the Universal House of Justice in your will. Nothing happens without money. Baha’i inheritance laws are actually very interesting.