by John Marshall Harlan, Cohen v. California — Opinion of the Court (1971)
“ At the outset, we cannot overemphasize that, in our judgment, most situations where the State has a justifiable interest in regulating speech will fall within one or more of the various established exceptions, discussed above but not applicable here, to the usual rule that governmental bodies may not prescribe the form or content of individual expression. Equally important to our conclusion is the constitutional backdrop against which our decision must be made. The constitutional right of free expression is powerful medicine in a society as diverse and populous as ours. ”
