David John Cawdell Irving is an English writer and Holocaust denier, who specialises in the military and political history of World War II, with a focus on Nazi Germany. He is the author of 30 books on the subject, including The Destruction of Dresden, Hitler's War, Churchill's War, and Goebbels: Mastermind of the Third Reich.
His work on Nazi Germany has been widely condemned because of his sympathy for the Third Reich, antisemitism and racism. He has associated with far right and neo-Nazi causes, famously during his student days seconding British Union of Fascists founder Oswald Mosley in a University College London debate on immigration. He has been described as "the most skillful preacher of Holocaust denial in the world today".
Irving's reputation as a historian was discredited after he brought an unsuccessful libel case against the American historian Deborah Lipstadt and Penguin Books. The English court found that Irving was an active Holocaust denier, antisemite, and racist, who "associates with right-wing extremists who promote neo-Nazism", and that he had "for his own ideological reasons persistently and deliberately misrepresented and manipulated historical evidence".