Complex sentence: Romanides contributed many speculations, some controversial, into the cultural and religious differences between Eastern and Western Christianity, and how these divergences have impacted the ways in which Christianity has developed and been lived out in the Christian cultures of East and West.
Split into simpler sentences: Romanides contributed many speculations, some controversial, into the cultural and religious differences between Eastern and Western Christianity. According to Romanides, these divergences have impacted the ways in which Christianity has developed and been lived out in the Christian cultures of East and West.