–to regulate commerce with US states/foreign countries/Indian tribes,
–to establish "uniform rule" of becoming a natural citizen, and "uniform laws on the subject of bankruptcies through the United States."
–to coin money and regulate it's value, and of foreign coin, and fix the standard of weights and measures.
–to provide punishment for counterfeiting US money
–to establish post offices and roads
–to promote science and arts by securing (for limited times) the exclusive right to their writings and discoveries
–to constitute tribunals inferior to the Supreme Court
–to define and punish piracies and felonies committed on high seas and offenses against the law of nations
–to declare war, grant letters of marque and reprisal and to make rules concerning captures on land and water.
–to raise and support armies, but no appropriation of money to that use shall be for a longer term than two years
–to provide and maintain a navy
–to make rules for the government and regulation of the land and naval forces
–to provide for calling forth the militia to execute the laws of the union, suppress insurrections and repel invasions
–to provide for training and arming the militia and governing such part of them as may be employed in the service of America
–"To exercise exclusive Legislation in all Cases whatsoever, over such District (not exceeding ten Miles square) as may, by Cession of particular States, and the acceptance of Congress, become the Seat of the Government of the United States, and to exercise like Authority over all Places purchased by the Consent of the Legislature of the State in which the Same shall be, for the Erection of Forts, Magazines, Arsenals, dock-Yards, and other needful Buildings;"
–to make all laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof.
In order that there wouldn't be any confusion, the Founding Fathers added the 10th Amendment: "The powers not delegated to the US by the constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." So you see, our country's government was designed so that the people would be in control. The definition for government, by the way is, "the group of people in office at a particular time; administration."