The defining influences on the works of author George Orwell include his experiences with totalitarianism, imperialism, and social injustice. Orwell's involvement in the Spanish Civil War and his critique of political systems significantly shaped his writing, particularly in works like "1984" and "Animal Farm." His advocacy for democratic socialism and commitment to exposing oppression and propaganda reflect his deep concerns about individual freedoms. Orwell's ability to blend narrative and political commentary has made his works enduring classics in literature and social critique.