[jackcosgrove]

Rome was the center of the Mediterranean world during the early church, the only city with a million people.

That's the only reason the Roman diocese became dominant. Not any sort of lineage or pedigree.

[badosu]

Actually, the patriarch at constantinople had the dominant authority at the early christendom.

There's a very informative youtube video about the schism: https://www.youtube.com/watch?v=a6rWf0k8d78