The struggle is always between the individual and his sacred right to express himself and the power structure that seeks conformity, suppression, and… - William O. Douglas

Those in power need checks and restraints lest they come to identify the common good for their own tastes and desires, and their continuation in office as essential to the preservation of the nation.

These examples and many others demonstrate an alarming trend whereby the privacy and dignity of our citizens is being whittled away by sometimes imperceptible steps. Taken individually, each step may be of little consequence. But when viewed as a whole, there begins to emerge a society quite unlike any we have seen -- a society in which government may intrude into the secret regions of man's life at will.

The vitality of civil and political institutions in our society depends on free discussion. As Chief Justice Hughes wrote in De Jonge v. Oregon, 299 U.S. 353, 365, 260, it is only through free debate and free exchange of ideas that government remains responsive to the will of the people and peaceful change is effected. The right to speak freely and to promote diversity of ideas and programs is therefore one of the chief distinctions that sets us apart from totalitarian regimes.</br> Accordingly a function of free speech under our system of government is to invite dispute. It may indeed best serve its high purpose when it induces a condition of unrest, creates dissatisfaction with conditions as they are, or even stirs people to anger. Speech is often provocative and challenging. It may strike at prejudices and preconceptions and have profound unsettling effects as it presses for acceptance of an idea. That is why freedom of speech, though not absolute, Chaplinsky v. New Hampshire, supra, 315 U.S. at pages 571-572, 62 S.Ct. at page 769, is nevertheless protected against censorship or punishment, unless shown likely to produce a clear and present danger of a serious substantive evil that rises far above public inconvenience, annoyance, or unrest. See Bridges v. California, 314 U.S. 252, 262, 193, 159 A.L.R. 1346; Craig v. Harney, 331 U.S. 367, 373, 1253. There is no room under our Constitution for a more restrictive view. For the alternative would lead to standardization of ideas either by legislatures, courts, or dominant political or community groups.Terminiello, 337 U.S. at 4-5.