Murder mystery: what killed Christianity in Europe?

[Fidel_Castronaut]

I think harking back to Westphalia and the church as an institution certainly plays its part, but in a modern context I think we need to look towards modern causes.

Sexual revolution, apathy, cohort effect. The last two are the repeating pattern, the first was one of the predominant triggers - women taking control over their sexual health, and people generally not finding the stories of the church convincing mixed with a general sense of no fucks given either way. Conservatism went out of vogue and only now is the Anglican Church catching up. Apathy has been the death of the church in England and Wales, and will see some sects (eg - Methodism) go extinct within the next couple of decades.