Johannes Gutenberg, the inventor of movable type, has been called "the most influential man of the millennium."

The first book printed in the colonies was in 1640. The first publisher was Lipincott.

Thomas Jefferson was considered a radical for his defense of Free Speech and opposition to the Alien and Sedition Acts. His criticism became so intense, that his supporters convinced him to prosecute under those same acts.

Justice Oliver Wendell Holmes argued that free speech must be upheld, except in cases of a "clear and present danger." He supported the prosecution of two anti-war socialists, because they discouraged citizens from fighting in World War I.