Explain possiable reasons for the decline of mayan empire

All three of these factors--overpopulation and overuse of the land, endemic warfare, and drought

the church governed the society after the empire fell.   constantine took charge of rome and ended the confusion which had over religion and made christianity as the only religion and that started ruling the roman empire. he also divided the empire into two and fortified the eastern part.   he ruled the eastern part.