Which Enlightenment idea is represented by having the three branches of government with their own individual powers

Montesquieu wanted separation of powers. His ideas of government divided each branch into legislative, executive and judicial branches which helped by making sure no one branch would be too powerful.

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.