A lot of people don't know that BOAN was based on a 1905 novel by Thomas Dixon called 'The Clansman.' Dixon was one of Wilson's school chums and fellow White Supremacists.
The article is about comedies, so "Birth of a Nation" is not included despite it appearing kind of funny now.
The original title for the movie was "The Klansman" or "The Clansman" (not sure which spelling was to be used) but D. W. Griffith apparently had some copyright issues.