Darius I brought the empire to the peak of its extent.
Answer:
The Constitution says federal laws are "the supreme law of the land," so the federal government could just take complete control. Nothing in the Constitution says the federal government has power to limit peoples' freedoms in the first place. ... People won't know their leaders and will lose control over the government
The main purpose was to support mutually beneficial trade. this lead to more free markets, fair trade, and economic growth overall in north america.
I think each level of government controls different laws so everything becomes more equal and more people get a say. By using separation of powers, it is more of a democracy which is what the us government is all about. There are many different people focused on certain topics or ideas within the levels of government and this helps everything stay organized and everyone then knows what they are doing.