Can someone tell me the main idea of this vid

the main idea is the most important, or central thought of a paragraph, or larger selection of text, which tells the reader what the text is about. so the main idea of that video is what was the purpose of the europeans enslaving the africans?

the results of roman expansion produced social conflict and civil war. julius caesar gained power and became a dictator but was then assassinated. the reign of augustus began a long period of imperial rule and peace in the roman empire. rome faced the problems of how to maintain peace, law, and order.

hope this !

brainliest?