American literature developed through distinct eras influenced by religious, political, and social movements. The Puritans focused on non-fiction works and the Bible while the Rationalists valued reason. Romanticism embraced emotion and nature. The Transcendentalists believed in a personal connection to nature. The Civil War and Realism led to more realistic depictions of life and society. Modernism used new styles and symbolism, while the Harlem Renaissance gave voice to the African American experience. Great authors have explored the American experience through each era.