People often think that what made America unique was its separation of powers and system of checks and balances, but those ideas were not really new at the time or unique to America. What actually was unique was having the Constitution as a single written document that formed the structure and scope of powers of the government and having every officer in that government take an oath to uphold and defend the Constitution. In almost every other government, the standard expectation was that officials would try to use their authority in any way they could get away with and the checks and balances against one person becoming a tyrant was that others who had power as well would stand against them. But the oath of office was different. It constrained by establishing that those who did not keep their oaths were both morally and legally impeachable. This allowed for powerful figures to be held in check or even removed without violence and bloodshed.