New Deal Denialism
It's annoying to see libertarians (and right wingers) citing silly Austrian arguments that deny the success of Keynesianism in dealing with the Great Depression. Generally they attempt to focus attention on US history, ignoring all the contemporaneous world history that falsifies their arguments.
But even focusing on US history defeats their arguments. Eric Rauchway, a UC Davis historian who's written The Great Depression And The New Deal, lists 4 revisionist arguments and why they're wrong, especially focusing on Amity Shlaes' arguments.
As an aside, it's kind of sad to see intelligent libertarians such as David Friedman slide into such denialism, both for teh depression and for global warming.