The twentieth century witnessed dramatic changes in terms of the structure of society, economics, politics, science, and technology, driving a change in Western literature from traditional to modern: old value systems were shattered; writing approaches and aesthetics changed; writers began to explore the psychological world and expand the discussion of humankind and modern civilization. This title takes classic literature by European and American authors of the twentieth century as research objects in order to comprehensively explore their thoughts, values, aesthetics, and narratives. Six major themes are used as units for analysis—existential meaning, self-identity, war and human nature, growing confusion, love and marriage, and anti-utopia. The authors argue that the six themes extend the themes of traditional literature and epitomize the unique characteristics of twentieth-century Western literature. The book will be of interest to students and scholars of literature, especially Western literature and twentieth-century literature.