So like the title says I'm curious about the history of Holocaust Denial. Obviously the history and almost every aspect of the Holocaust has been written in great detail by a huge amount of historians, scientists and many other researchers. But outside of David Irving and some people online I've never been able to find a credible source as to when this started or who started it. I'm sure I could guess why it started in the first place. But that's a different question. Who was the first person to outright deny this event? How did this idea get any form of traction? Who conducted this "research"?