I apologize if this violates the 20 year rule, but religious levels are plummeting in Europe. What has caused this drop? Why did regions with religious conflict (i.e. Ireland/Britain) seemingly overcome this conflict in the late 20th century?
If you're looking for responses that cover events/conditions within the last 20 years, then yes, the question does violate the 20-year rule and should be removed. In that case, x-post the question to a sub that allows discussion on current events, e.g. /r/AskSocialScience.
If you're ok with responses that cut off at 1994, the question is fine here. A reminder to all respondents: be mindful of this sub's 20-year rule and confine discussion to pre-1994 only. Thanks!
This might be a good question for /r/AskAnthropology as well.