Any great organization can go through sectarian phases.
Inequality can have a bad downside, but equality, for its part, sure does get in the way of coordination.
It's unlikely that the organized religions will get more sectarian... or is it? I am not at all sure.
The human body is always treated as an image of society.
Pretensions to moral superiority are devastatingly destructive.
It seems true that the growth of science and secularism made organized Christianity feel under threat.