Answer:
The Preamble's phrase "to form a more perfect Union" refers to the Founding Father's idea that a stronger central government would make it easier for the states to work together as one country .
Step-by-step explanation:
The Constitution of the United States, approved at the Philadelphia Convention on September 17, 1787, is the supreme law of the nation. But this situation was not always like this: prior to the enactment of the Constitution, there was another supreme law, called the Articles of Confederation, which organized the United States around a Congress that exercised executive and legislative functions and was made up of representatives of the 13 states, equally distributed.
Now, this Congress organized by the Articles of Confederation did not efficiently organize the country into a federal nation, but rather as a set of states with their own prerogatives and powers. Thus, this central government only fulfilled functions of foreign representation and military organization in the face of foreign attacks, but did not establish an efficient organization in terms of internal politics, be it monetary, commercial, economic, social, etc. Therefore, each state defended its own interests, even going so far as to issue its own currencies, while the federal government was unable to finance its own projects because it could not collect taxes. This situation reached a point of no return that threatened the breakdown of this unit after a series of internal revolts such as the Shays' Rebellion, where the federal government demonstrated its ineffectiveness.
As a consequence of these situations, the states decided to modify the Articles to improve these errors, finally creating the Constitution of the United States which, in its Preamble, establishes as one of its main motives that of "to form a more perfect Union".