"City of the World" is a novel by the American writer Upton Sinclair, in which he depicts the life of migrants in Chicago at the beginning of the 20th century. The book tells the story of various characters who arrive in a big city to find happiness and success. The author reveals the problems of social inequality, corruption, unemployment and life difficulties that their heroes have to face. "City of the World" is an important literary work that reveals to the reader a reflection of the complex social landscape of the beginning of the last century.