“Free speech is the bedrock of liberty and a free society. And yes, it includes the right to blaspheme and offend.”

Quotes 1990s, 1995-1999, The Common Good (1998)
Context: Property rights are not like other rights, contrary to what Madison and a lot of modern political theory says. If I have the right to free speech, it doesn't interfere with your right to free speech. But if I have property, that interferes with your right to have that property, you don't have it, I have it. So the right to property is very different from the right to freedom of speech. This is often put very misleadingly about rights of property; property has no right. But if we just make sense out of this, maybe there is a right to property, one could debate that, but it's very different from other rights.

"For the Defense Written for the Associated Press, for use in my obituary" (20 November 1940)
1940s–present
Context: Having lived all my life in a country swarming with messiahs, I have been mistaken, perhaps quite naturally, for one myself, especially by the others. It would be hard to imagine anything more preposterous. I am, in fact, the complete anti-Messiah, and detest converts almost as much as I detest missionaries. My writings, such as they are, have had only one purpose: to attain for H. L. Mencken that feeling of tension relieved and function achieved which a cow enjoys on giving milk. Further than that, I have had no interest in the matter whatsoever. It has never given me any satisfaction to encounter one who said my notions had pleased him. My preference has always been for people with notions of their own. I have believed all my life in free thought and free speech—up to and including the utmost limits of the endurable.

1960s, The American Promise (1965)
Context: We must preserve the right of free speech and the right of free assembly. But the right of free speech does not carry with it, as has been said, the right to holler fire in a crowded theater. We must preserve the right to free assembly, but free assembly does not carry with it the right to block public thoroughfares to traffic. We do have a right to protest, and a right to march under conditions that do not infringe the constitutional rights of our neighbors. And I intend to protect all those rights as long as I am permitted to serve in this office. We will guard against violence, knowing it strikes from our hands the very weapons which we seek — progress, obedience to law, and belief in American values.

Source: Soon to be a Major Motion Picture (1980), p. 214.

Jeremy Corbyn: It's not Trump's business who's PM https://www.bbc.co.uk/news/uk-politics-44819444, BBC News, 13 July 2018
2010s, 2018

Free speech in an age of identity politics (2015)

2014-09-07
Tom Udall and Bernie Sanders
The Threat to American Democracy
Politico
https://www.politico.com/magazine/story/2014/09/the-threat-to-american-democracy-110683
2010s

"On Freedom of Speech and the Press", Pennsylvania Gazette (17 November 1737) http://books.google.de/books?id=HptPAQAAIAAJ&pg=PA431&dq=pillar.
Context: Freedom of speech is a principal pillar of a free government; when this support is taken away, the constitution of a free society is dissolved, and tyranny is erected on its ruins. Republics and limited monarchies derive their strength and vigor from a popular examination into the action of the magistrates.

The Times of India, ‘Don’t allow religious hooligans to dictate terms’ http://archive.is/ecOpa (16 January 2008)