Week 4 Atleast 200 words What were some differences between Byzantine Christianity (Eastern Church) and the Roman Catholic Christianity? Week 5 at least 200 words Islam was founded in the early 7th century. By the 9th century, Islam had spread to Europe, Asia, and Africa. Why did it spread so fast and so successful? Week 6 atleast 200 words How were the declines of the Aztec and Inca empires similar? .