American Romanticism was a literary movement that emerged in response to industrialization and emphasized emotion, nature, and the individual. Notable authors of the period included Ralph Waldo Emerson, Henry David Thoreau, Edgar Allan Poe, and Nathaniel Hawthorne, who wrote about transcendentalism, nationalism vs. sectionalism, and the dark side of human nature. The movement also saw the rise of popular poets like Henry Wadsworth Longfellow who celebrated American culture and heritage.