In your own words, explain why the Islamic empire was not a caliphate for much of its history.

hello there, can you add the "following" multiple choices

a widespread disease that killed many people

the split of the christian church

invasion from arab muslims

according to my research (britannica and quizlet) the first settlements were along the huang river because it could give the crops more fertile soil that really it out. this was due to the yellow slit caused by floods of the river.