I liked most of the book, but Russia becoming a theocratic empire seems....significantly off
Curiosity: why?
It seems silly, especially since it implies that the whole thing was started by an orthodox priest executing some infected soldiers. I could see this happening in a place where religious fervor is extremely high, but Russia was part of a communist state that persecuted religious beliefs for almost 80 years, and it only ended a couple of decades ago even if policies lightened after Stalin died. Russia's democratic status collapsing back into authoritarianism is more than plausible even without zombies, but a theocracy? There's no basis for that! At least there are still a significant number of communists in Russia, but as far as I know theocrats are quite limited even if there are plenty of religious people.
I could see a theocratic revolution happen in the United States, the United Kingdom, Israel, or even Italy if the world really got shook up, but just not in Russia.
But with the whole zombie apocalypse thing, you'd think that the government would be completely incapable of persecuting religious people, movements and minorities. I don't know that much about Russia, or WWZ, so please correct me if I'm wrong about any facts. What I don't think I'm wrong about though, is human nature. Imagine an entire country being torn apart by zombies. The people, not the leaders or powerful groups, but the majority of the people would need their religious faith in order to survive. Sure, they could have faith in something else, but the point is, they need faith in something, so why not a religion ( not actually sure which religion is popular or practiced in Russia right now ).
If anything, the whole "priest killing infected thing" would only serve to prove my point. This act would no doubt have been very symbolic to those who have either seen or heard about it, and would only serve to bolster the religious fervor among the Russian populace. I really wish I could get access to World War Z, that way I can get a better perspective, but from the looks of it, this priest would have either been a powerful leader, or a Christ-like figure, having descended from the heavens to wipe out the zombie plague.
Seems like something people, people who have faced danger from the zombies day after day after day, would want to believe in.