The First Amendment is perhaps the most important - and most debated - amendment in the US Constitution. It establishes freedom of speech, as well as that of religion, the press, peaceable assembly and the right to petition the government. But how has the interpretation of this amendment evolved? Milton Cantor explores America's political response to the challenges of social unrest and how it shaped the meaning of the First Amendment throughout the twentieth century. This multi-layered study of dissent in the United States from the early 1900s through the 1970s describes how Congress and the...