In the landmark Supreme Court case Schenck v. United States (1919), Charles Schenck was convicted under the Espionage Act for distributing leaflets urging draft resistance during World War I. The Supreme Court, led by Justice Oliver Wendell Holmes Jr., introduced the 'clear and present danger' test to determine whether speech could be restricted under the First Amendment. Which of the following statements best reflects the significance of this case in relation to the limits placed on free speech?