History is not static and it does not progress linearly. There was more free speech and unimpeded expression in 5th-century Athens than in Western Europe between 1934-45, or in Eastern Europe during 1946-1989. An American could speak his mind more freely in 1970 than now. Many in the United States had naively believed that the Enlightenment, the U.S. Constitution, and over two centuries of American customs and traditions had guaranteed that Americans could always take for granted free speech and unfettered inquiry That is an ahistorical assumption. The wish to silence, censor, and impede thought is just as strong a...