According to diamond, how does religion evolve along with increasingly complex societies (band, tribe, chiefdom, state, empire) ?

I believe the answer is: increasing complex societies have a lot of religious leaders

According to diamond, Religions would influence the type of leader that seen as a ideal within a society since the persona of an ideal leader tend to be regulated in the religions' sacred text. This would also lead to the type of government system that seem favourable over another and the type of law that should be inmposed to all citizens.