How did the role of caliphs and the creation of the Umayyad dynasty lead to the major split of islam?

Why did roosevelt support a “europe first” strategy even though it had been japan that had first attacked the united states?

This pie chart shows statistics related to the world's population. a pie chart like this one is most for making predictions about the future. showing how parts make up a whole. presenting amounts over a period of time. comparing information from different sources.

Why do you think jefferson thought lewis was qualified to explore the louisiana purchase? ?