Which is the main purpose of the preamble of the u. s. constitution

It's important because it establishes that America is a nation defined by the people. It outlines the goals of the government. Here I quote some: "To establish a more perfect union, establish justice, ensure domestic tranquility, provide for the common defense, promote the general welfare, secure the blessings of liberty to ourselves and our posterity."

Hope this helped! :)

Answer/// absolute and unchanging laws;