Final answer:
American literature since 1945 has seen the emergence of countercultural movements, regionalist perspectives, and multicultural voices. The transition from literary modernism to postmodernism reflects the disorienting changes in the nation.
Step-by-step explanation:
American literature since 1945 has seen the rise of countercultural Beats and the confessional poets. It contains the voices of radical feminists, conservative regionalists, and proud multiculturalists. The American writers who lived through this era present an insightful record of what their nation and its people once were, of what they are, and of what they may become.
The changes that the nation has undergone since 1945 have often been disorienting, reflected in the transition from literary modernism to postmodernism. Postmodernist authors playfully use experimental literary techniques to represent the many lives Americans live in the second half of the century and beyond.
The sensibility of postmodernism is reflected in the recognition that lives are increasingly lived through signs and images seen on screens, with a growing sense of the 'textuality' of experience. Some notable works of American literature since 1945 include Donald Barthleme's story 'The School' and Don DeLillo's novel 'White Noise', which reflect postmodern style and sensibility.