What is One fact about the preamble of the constitution?

Answer 1

There are a number of facts about the preamble. It was put in the constitution so as to define the obligation and responsibility of the government. This is the only part that cannot be changed through an amendment.

Answer 2

It provides a generalized statement for what forming the Constitution would hopefully establish.
We the people, in order to form a more perfect Union, establish justice, ensure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this Constitution for the United States of America.