The paradox of tolerance is important in the discussion of what, if any, boundaries are to be set on freedom of speech. Popper asserted that to allow freedom of speech to those who would use it to eliminate the very principle upon which they rely is paradoxical.[6] Rosenfeld states "it seems contradictory to extend freedom of speech to extremists who... if successful, ruthlessly suppress the speech of those with whom they disagree," and points out that the Western European Democracies and the United States have opposite approaches to the question of tolerance of hate speech.[7]