Theodore Dreiser (1871–1945) stands as one of the preeminent American novelists and social commentators of the early 20th century. His novel 'Sister Carrie' (1900), which is often referenced as a seminal work in the naturalist genre, broke new ground by offering a narrative that unflinchingly addressed the gritty realities of urban life and the pursuit of the American Dream from a determinist perspective. Dreiser's portrayal of his protagonist, Carrie Meeber, reflected the socio-economic forces that shape individuals' lives, reflecting his belief that social conditions, heredity, and environment were the predominant forces in shaping human behavior. His literary style is characterized by a keen observation of detail, an unembellished prose, and a focus on the moral ambiguities of the human experience. Dreiser's other notable works include 'Jennie Gerhardt' (1911), 'The Financier' (1912), 'The Titan' (1914), and 'An American Tragedy' (1925), the latter of which cemented his reputation as a critical and profound chronicler of American life. 'An American Tragedy' explores the dark undercurrents of ambition and the devastating consequences of social inequities, further illustrating Dreiser's profound impact on the American literary canon and his advocacy for social reform through his written works.