Final answer:
The phrase in question refers to the Preamble of the U.S. Constitution, which outlines the fundamental objectives and guiding principles that the Constitution was meant to embody and protect.
Step-by-step explanation:
The phrase 'We the people of the United States, in order to form a more perfect union...' refers to the Preamble of the United States Constitution. This introductory sentence states the fundamental purposes and guiding principles that the Constitution was meant to serve. Its aim was to build a stronger government that would be able to ensure justice, provide for the common defense, promote the general welfare, and secure the blessings of liberty for the populace. It is basically an introduction to the Constitution and sets the stage for the detailed provisions that follow.
Learn more about Preamble of the U.S. Constitution