David John Cawdell Irving is an English author who has written on the military and political history of World War II, especially Nazi Germany. He was found to be a Holocaust denier in a UK court in 2000 as a result of a failed libel case.

Holocaust denial is an antisemitic conspiracy theory that asserts that the Nazi genocide of Jews, known as the Holocaust, is a fabrication or exaggeration. Holocaust denial includes making one or more of the following false claims:Nazi Germany's "Final Solution" was aimed only at deporting Jews from the territory of the Third Reich and did not include their extermination. Nazi authorities did not use extermination camps and gas chambers for the mass murder of Jews. The actual number of Jews murdered is significantly lower than the accepted figure of approximately six million. The Holocaust is a hoax perpetrated by the Allies, Jews, or the Soviet Union.