From The Double Vision, which aptly anticipates the increasingly intrusive religious orthodoxy and fundamentalism into politics:
In the course of time the movement begun by the Reformation did achieve one major victory: the gradual spread throughout the Western world of the principle of separation of church and state. Something of the genuine secular benefits of democracy have rubbed off on the religious groups, to the immense benefit of humanity, and depriving religion of all secular or temporal power is one of the most genuinely emancipating movements of our time. It seems to be a general rule that the more “orthodox” or “fundamentalist” a religious attitude is, the more strongly it resents this separation and the more consistently it lobbies for legislation giving its formulas secular authority. (CW 4, 174-5)
I’ve expanded an earlier post to provide some sense of how and why that is already happening here.