United states preamble and first amendment to the united states constitution. (1787, 1791) preamble we, the people of the united states, in order to form a more perfect union establish justice, insufe domestic tranquillity, provide for the common defence, promote the general welfare, and secure the blessing of liberty to ourselves and our posterity do ordain and establish this constitution of the united states of america. how did the voting rights acts of 1819, 1920, and 1971 expand the "blessings of liberty" to more of the united states polulation? write a short essat to explain tour answer