The constitutions written by the states provided several important precedents for the later federal system created by the Constitution of 1787. One of the most important was the principle of:.

Explanation:

The Constitution of the United States is the supreme law of the United States of America. It was adopted in its original form on September 17, 1787 by the Constitutional Convention of Philadelphia (Pennsylvania) and then ratified by the people at conventions in each state in the name of "We the People". The Constitution has a central place in American law and political culture.The United States Constitution is the oldest federal constitution currently in force in the world.

An original copy of the document can be found in the National Archives in Washington D.C.

im pretty sure it has something to do with the end of ww1