Abraham Lincoln and his administration restricted constitutional liberties during the Civil War, including freedom of speech and freedom of the press.
Once a Bastion of Free Speech, the A.C.L.U. Faces an Identity
The First Amendment doesn't guarantee you the rights you think it
Cornerstone Speech American Battlefield Trust
Dare to Speak: Defending Free Speech for All
Free Speech on Trial
Free Speech Center
World War I - The Free Speech Center
First Amendment - Rights, U.S. Constitution & Freedoms
Free Speech - University of California, Berkeley
Tension between free speech and inclusivity on college campuses
Free Speech and Unfree News — Harvard University Press
James Madison Center for Free Speech
Free Speech American Civil Liberties Union
Why Conservatives Invented a 'Right to Post' - The Atlantic