In the 20th century,with the great development of technologies and economic,especially the WWI and WWII, western countries’ old social problems and contradictions were aggravated continuously
New problems also appeared
The two World Wars made the spirit system of western countries’ hardly collapsed
The twentieth century is a flourishing period for the development of American literature, whose main characteristics is irrationalism presented in modernism and post-modernism accompanied with naturalism and post-realism
The flourishing of American literature owns a great deal to the social background both at home and abroad, and to the influence of European ideologies, which is the result of globalization
From the following aspects: ·SOCIAL& ECONOMICAL: Great Depression(Economic Crisis) ·P