Prior restraint, the suppression of expression before it is disseminated, remains a contentious legal and ethical issue, differing from post-publication censorship. It takes the form of licenses, injunctions, or corporate regulations, frequently justified by national security or moral considerations. Legal systems, particularly the Anglo-American tradition, regard it as a serious violation of free speech, as emphasized by Blackstone’s focus on freedom from pre-publication restrictions.
Thinkers such as Herbert Spencer analyzed its role in society, while John Paul Stevens underscored its lack of legal justification. The U.S. Supreme Court’s Near v. Minnesota decision confirmed its constitutional invalidity, except in limited circumstances, illustrating a continuing struggle between control and freedom.