[@Shylarah] I don't get the impression that Oromis wants to destroy cultural diversity. He just wants to straighten out a land drenched in warfare and violence. Will certain cultural practices get wiped out due to his reformations? Definitely, but I don't think that's his goal. He purportedly wants to bring peace to a chaotic, deadly world. What's the old saying? You have to break a few eggs to make an omelette. Maybe your character could join because, having seen the horrors people can inflict on each other, siding with Oromis seems like the only sane option? At least he plans to do something with his newfound authority instead of just using it as a springboard to launch even more conquests. Supposedly.