1、American Puritanism: Puritanism is the practices and beliefs of the Puritans. The Puritans were originally members of a division of the Protestant Church. The first settlers who became the founding fathers of the American nation were quite a few of them. They were a group of serious, religious people, advocating highly religious and moral principles. As the word itself hints, Puritans wanted to purity their religious beliefs and practices. They accepted the doctrine of predestination, original sin and total depravity, and limited atonement through a special infusion of grace form God. As a culture heritage, Puritanism did have a profound influence on the early American mind. American Puritanism also had a enduring influence on American literature.

2、 American Realism: In American literature, the Civil War brought the Romantic Period to an end. The Age of Realism came into existence. It came as a reaction against the lie of romanticism and sentimentalism. Realism turned from an emphasis on the strange toward a faithful rendering of the ordinary, a slice of life as it is really lived. It expresses the concern for commonplace and the low, and it offers an objective rather than an idealistic view of human nature and human experience.

3、Transcendentalism: In New England, an intellectual movement known as transcendentalism developed as an American version of Romanticism. The movement began among an influential set of authors based in Concord, Massachusetts and was led by Ralph Waldo Emerson. Like Romanticism, transcendentalism rejected both 18th century rationalism and established religion, which for the transcendentalists meant the Puritan tradition in particular. The transcendentalists celebrated the power of the human imagination to commune with the universe and transcend the limitations of the material world. They found their chief source of inspiration in nature. Emerson’s essay Nature was the major document of the transcendental school and stated the ideas that were to remain central to it.

4、Free verse: free verse is the rhymed or unrhymed poetry composed without attention to conventional rules of meter. Free verse was first written and labeled by a group of French poets of the late 19th century. Their purpose was to deliver poetry from the restrictions of formal metrical patterns and to recreate the free rhythms of natural speech. Walt Whitman was the precursor who wrote lines of varying length and cadence, usually not rhymed. The emotional content or meaning of the work was expressed through its rhythm. Free verse has been characteristic of the work of many modern American poets, including Ezra Pound and Carl Sandburg.

5、Naturalism: A more deliberate kind of realism in novels, stories and plays, usually involving a view of human beings as passive victims of natural forces and social environment. Naturalism was a new and harsher realism. It developed on the basis of realism but went a step further than it in portraying social reality.

6、Lost Generation: Also termed the Sad Young Men, which was created by F.S. Fitzgerald in his book All the Sad Young Men. The term in general refers to the post- World War I generation, but specifically a group of US writers who came of age during the war and established their reputation in the 1920s. It stems from a remark made by Gertrude Stein to Ernest Hemingway, “You are all a lost generation.” Hemingway used it as an epigraph to The Sun Also Rises, a novel that captures the attitudes of a hard-drinking, fast living set of disillusioned young expatriates in postwar Paris. The generation was “lost” in the sense that its inherited values were no longer relevant in the postwar world and because of its spiritual alienation from US, they seemed hopelessly provincial, materialistic, and emotionally barren. The term embraces Hemingway, Fitzgerald, Dos Passos, E.E. Cummings and so on.

7、International theme：The meeting of America and Europe, American innocence in contrast with European decadence and the moral and psychological complications arising therefore. The typical pattern of the conflict between the two cultures could be that of a young American man or girl who goes to Europe and affronts his or her destiny. Marriage and love are used by James as the focal point of the confrontation between the two value Systems, and the protagonist usually goes through a painful process of spiritual growth, gaining knowledge of good and evil from the conflict.

8、Symbolism: It is a movement in literature and the visual arts that originated in France in the poetry of Charles Baudelaire in the late 19th century. In literature, symbolism was an aesthetic movement that encouraged writers to express their ideas, feelings, and values by means of symbols or suggestions rather than by direct statements. Hawthorne and Melville are masters of symbolism in America in the 19th century.