Nikolai Gogol was a Ukrainian-born Russian writer known for his distinctive contributions to the genre of realism, particularly in literature during the 19th century. He is celebrated for his ability to blend elements of the grotesque with sharp social commentary, often portraying the absurdities and bureaucratic inefficiencies of Russian society. Gogol's works, such as 'The Overcoat' and 'Dead Souls', embody key characteristics of realism by focusing on everyday life, ordinary characters, and the struggles of individuals within a corrupt system.