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?

hi did u tell us this and this is okay in the

after the roman empire, the catholic church began to unify by taking on many duties of a government.