How and why was the history of the eastern half of the Roman empire so different from that of the western half? What role did emperors play in the Eastern Church?

I only know the last one but In Byzantine times, the emperor had supreme authority in the Church. He selected the patriarch of Constantinople, who ranked just below him in matters of religion. Unlike the pope in the west, the patriarch did not claim strong authority over other patriarchs and bishops.

Explanation:

here are some events that to cause increased conflict between the north and south

1) mexican cession- gaining modern day california, utah, arizona, and new mexico from mexico. caused southern and northern politicians to fight over whether or not there would be slavery in these newly acquired territories.

2) uncle tom's cabin- this famous book described the cruelty of slavery in the south during the antebellum period, causing more northerners to support abolition and southerners to resent the book as they felt it unfairly depicted southern society.

3) kansas- nebraska act- disagreements over whether or not kansas and nebraska would be free or slave states caused issues between northern and southern politicians in congress.

4) bleeding kansas- this fighting took place in kansas after congress allowed this territory to vote on whether or not they would have slavery. citizens were killed and buildings were destroyed during this fighting.