After Upton Sinclair, famed author of The Jungle, was arrested for reading the First Amendment on Liberty Hill in 1923, The Nation commented: “When we contemplate the antics of the chief of police of Los Angeles, we are deterred from characterizing him as an ass only through fear that such a comparison would lay us open to damages from every self-respecting donkey.” In this lively history of our most fundamental and perhaps most vulnerable right, Chris Finan traces the lifeline of free speech from the War on Terror back to the turn of the last century.