Principles of the Constitution
And how it works today
The main 7 are Popular sovereignty,Republicanism,Federalism, Separation of power, Checks and Balances, limited government, and individual rights
In the constitution it states "We the people, of the united states...establish this to be the constitution of the united states."
This is most apparent in the election of the president today.
In the constitution is tells all states to have a republican form of government
This is used today through the election of state representatives, congress men,etc.
The most prime example of this is the national government of the united states giving powers to the states today.
Separation of Power
In the constitution power is split equally among 3 branches