The ultimate good desired is better reached by free trade in ideas. The best test of truth is the power of the thought to get itself accepted in the competition of the market. We should be eternally vigilant against attempts to check the expression of opinions that we loathe and believe to be fraught with death, unless they so imminently threaten immediate interference with the lawful and pressing purposes of the law that an immediate check is required to save the country. Mr. Justice Holmes, Abrams vs. United States, 1919 more...