Sorry but that is NOT what the Preamble says. The People of the United States were ASSEMBLED in State conventions specifically to remove the States from that approval. States were subordinate to the People of the United States and CREATED by the command of the Continental Congress. States were NEVER over the Nation. Parts cannot be greater than the whole.
The Constitutional Convention was authorized by the Congress of the United States. States had nothing to say about it.
Sorry for your deficiencies in education, but that is what a REPUBLIC is. The founders did not create a new NATION, they created a common government. The states were not destroyed, by states they acceded to a common government, and to that new government they DELEGATED certain powers - for enumerated puposes. Delegated powers can be resumed.
The Constitutional Convention was authorized by the Congress of the United States. States had nothing to say about it.
States were the parties in CONGRESS. And per their existing agreement - the Articles of Confederation & Peretual Union - such changes required UNANIMOUS consent per Article XIII - yet only 12 states attended, two members of the New York delegation left in disgust leaving that state without a vote in convention, and the NEW government was created when 9 - NINE - states ratified. I don't know about math in yankee states, but here in the South, 9 is less than 13.
Seems kind of odd, since the Congress of the United States is defined by, and empowered by the Constitution. The Congress of the United States under the Constitution did not exist until the Constitution was ratified.