Realism and naturalism emerged in mid-19th century literature as a response to romanticism. These movements focused on depicting life accurately, emphasizing objectivity and the influence of environment and heredity on characters. Key authors like Balzac, Flaubert, and Zola in France, and Howells and Crane in America, explored social issues through detailed descriptions and vernacular language. Their works often critiqued class inequality, gender roles, and the impact of industrialization on society.