As if the church and state were not desired by humanity, else they wouldn't exist.
It has to be a strategy or benefit of some group powerful enough to sustain it.
It would be interesting to try to understand who benefited from it and why, which is sort of what my blog post was trying to scratch the surface of. The sociological and anthropological topics are far too complex to be argued succinctly. We could go on for years arguing. And that is why I am in the field of computer programming instead.