The history of the United States government constitutes the formation, growth, development, and evolution of the federal government of the United States, including the constitution, the United States Code, the office of the presidency, the executive departments and agencies, Congress, the Supreme Court, and the lower federal courts. It includes government roles, structure, and policy in all aspects, including evolution of the governmental structure, formation of new agencies and departments, assumptions of new roles and functions, enactments of new codes, regulations, and laws, and inception of entirely new roles of government in American society from 1776 to the present day.