By ignoring history, one can make the same historical mistakes. By studying history, one can test theories without exercising the theory. The elimination of free speech leads to tyranny of thought and promotes extremism. One of the first steps toward totalitarian is the elimination of free speech. This has happened in Germany, Russia, China and many other countries. The radical left is imposing limits on free speech at our colleges and through the press. This will lead to a destructive future and must be countered.