Modernism has been arguably the most important artistic movement of the twentieth century. It is characterized by a certain malaise, a generally dark perspective on the state of the world, a sense of the meaninglessness of what were once held as society's certainties, and a conviction that only the rebellious artist tells the truth about the world.
In many works, there is a sense of disillusionment, alienation, and meaninglessness as a result of World War I:
The coming of World War I fulfilled the modernist predictions of a coming fragmentation and destruction beyond anything they could have imagined. [eNotes]
Other major events which affected Modernism are the Great Depression, the rise of Fascism, and the horrors of total war with World War II.
In American literature, Ernest Hemingway became a voice of the alienated and disillusioned, particularly through his male characters. In one story, "Another Country," soldiers are wounded and thus removed from battle. After becoming distanced from the war, they find themselves strangely alienated and disillusioned with the purported "heroism" of being a soldier.
In British literature, the Irish Literary Revival, also known as the Celtic Renaissance, began in late Victorian times. It sought to revive the dying Gaelic language, to explore Celtic history and language, and to express the Irish spirit. Writers in Ireland and in many former British colonies have taken a searching look at the legacy of empire.
Many of the poets who survived the First World War went on to express the perspectives of the "lost generation" in the Modernist poetry of the 1920s. Prominent among the Modernist poets was T. S. Eliot, whose long poem The Wasteland stands as a monument to the bitterness and despair of this "lost generation." At times poets made direct statements of social protest as well. For instance, W. H. Auden wrote in his famous poem, "September 1, 1939":
I sit in one of the dives
On Fifty-second Street
Uncertain and afraid
As the clever hopes expire
Of a low dishonest decade.
Despite the rise of unromantic Modernism, a romantic strain remained in British poetry through the work of such poets as Dylan Thomas.
The class system and the plight of the industrial worker emerged as key themes in the works of D. H. Lawrence. Irish writer James Joyce also wrote of working-class life in such works as The Dubliners.
Many social and political issues in the 1930s and 1940s gained attention and brought about the emergence of a new group of novelists. One of these novelists was Aldous Huxley, who in Brave New World satirized the misuse of science. Another topic of satire was totalitarian governments as in George Orwell's fable Animal Farm.