C.E.2c the preamble of a constitution sets forth the goals and purposes to be served by the government. to form a union The Preamble to the Constitution of the United States of America expresses the reasons the constitution was written. to establish justice to ensure domestic justice The Preamble to the Constitution of the United States of America begins, "We the people", which establishes that the power of government come from the people to provide defense The student will demonstrate knowledge of the foundations of American constitutional government by: c) identifying the purposes for the Constitution of the United States of America as they are stated in its preamble.