Liberalism in the United States is based on concepts of unalienable rights of the individual. The fundamental liberal ideals of consent of the governed, freedom of speech, freedom of the press, freedom of religion, the separation of church and state, the right to bear arms, the right to due process, and equality before the law are widely accepted as a common foundation of liberalism. It differs from liberalism worldwide because the United States never had a resident hereditary aristocracy, and avoided much of the class warfare that characterized Europe. According to American philosopher Ian Adams, "all US parties are liberal and always have been", they generally promote classical liberalism, which is "a form of democratized Whig constitutionalism plus the free market", and the "point of difference comes with the influence of social liberalism" and principled disagreements about the proper role of government.
Since the 1930s, liberalism is usually used without a qualifier in the United States to refer to modern liberalism, a variety of liberalism that accepts a government role to prevent market failures and promotes expansion of civil and political rights, with the common good considered as compatible with or superior to the absolute freedom of the individual. This political philosophy was exemplified by Franklin D. Roosevelt's New Deal policies and later Lyndon B. Johnson's Great Society. Other accomplishments include the Works Progress Administration and the Social Security Act in 1935, as well as the Civil Rights Act of 1964 and the Voting Rights Act of 1965. This variety of liberalism is also known as modern liberalism to distinguish it from classical liberalism, from which it sprang out along with modern American conservatism.
