[2] The letter describes right-wing illiberalism and then-US president Donald Trump as "a real threat to democracy", but argues that the political left engages in censorship of its own, denouncing "an intolerance of opposing views, a vogue for public shaming and ostracism, and the tendency to dissolve complex policy issues in a blinding moral certainty."
Per the letter, "Editors are fired for running controversial pieces; books are withdrawn for alleged inauthenticity; journalists are barred from writing on certain topics; professors are investigated for quoting works of literature in class; a researcher is fired for circulating a peer-reviewed academic study; and the heads of organizations are ousted for what are sometimes just clumsy mistakes", "The restriction of debate, whether by a repressive government or an intolerant society, invariably hurts those who lack power and makes everyone less capable of democratic participation", and "We need to preserve the possibility of good-faith disagreement without dire professional consequences."
Notable signatories include linguist Noam Chomsky; fiction writers J. K. Rowling, Salman Rushdie, Margaret Atwood, Martin Amis, John Banville, Daniel Kehlmann, and Jeffrey Eugenides; world chess champion Garry Kasparov; political scientist Francis Fukuyama; feminist Gloria Steinem; cognitive psychologist Steven Pinker; journalists Fareed Zakaria, Malcolm Gladwell, Anne Applebaum, Ian Buruma, David Frum, and David Brooks; composer Wynton Marsalis; writer and former Leader of the Liberal Party of Canada Michael Ignatieff; political theorist Michael Walzer; economist Deirdre McCloskey; poet Roya Hakakian; surgeon Atul Gawande; music journalist Greil Marcus; and social psychologist Jonathan Haidt.
[3] In an opinion piece for CNN, John Avlon praised the letter, writing, "Demonizing principled disagreement does not advance liberal values—it fuels negative partisan narratives that Trump's reelection depends on.
[8] Vox writer and signatory Matthew Yglesias faced pushback from transgender coworker Emily St. James, who criticized the letter for being signed by "several prominent anti-trans voices".