"There is what I call the American idea," declared Theodore Parker in the Anti-Slavery Convention of 1850. "This idea demands, as the proximate organization thereof, a democracy--that is, a government of all the people, by all the people, for all the people; of course, a government on the principle of eternal justice, the unchanging law of God; for shortness' sake, I will call it the idea of Freedom." These are noble words, and they are thought to have suggested a familiar phrase of Lincoln's Gettysburg Address, thirteen years later. Yet students of literature, no less than students of politics, recognize the difficulty of summarizing in words a national "idea." Precisely what was the Greek "idea"? What is today the French "idea"? No single formula is adequate to express such a complex of fact, theories, moods--not even the famous "Liberty, Fraternity, Equality." The existence of a truly national life and literature presupposes a certain degree of unity, an integration of race, language, political institutions, and social ideals. It is obvious that this problem of national integration meets peculiar obstacles in the United States. Divergencies of race, tradition, and social theory, and clashing interests of different sections have been felt from the beginning of the nation's life. There was well-nigh complete solidarity in the single province of New England during a portion of the seventeenth century, and under the leadership of the great Virginians there was sufficient national fusion to make the Revolution successful. But early in the nineteenth century, the opening of the new West, and the increasing economic importance of Slavery as a peculiar institution of the South, provoked again the ominous question of the possibility of an enduring Union. From 1820 until the end of the Civil War, it was the chief political issue of the United States. The aim of the present chapter is to show how the theme of Union and Liberty affected our literature.