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The Cato Institute
http://www.cato.org/
An American libertarian think tank ‘dedicated to the principles of individual liberty, limited government, free markets and peace.’
Freedom House
http://www.freedomhouse.org/
A watchdog that monitors the state of freedom around the world, and publishes an influential ranking of countries according to how free they are.
The Guardian
http://www.theguardian.com/world/freedom-of-speech
http://www.theguardian.com/media/press-freedom
The Guardian newspaper’s homepages for news and opinion related to press freedom and freedom of speech.
Index on Censorship
http://www.indexoncensorship.org
Website of a well-known organization that campaigns on freedom of speech issues, housing a wide variety of articles, blog posts, podcasts, and other resources.
John Stuart Mill (utilitarianism.net)
http://www.utilitarian.net/jsmill/
An archive of Mill’s work, and of philosophical work about Mill.
Onora O'Neill: ‘Freedom of the Press Cannot be Unrestricted’
http://www.independent.co.uk/voices/commentators/onora-oneill-freedom-of-the-press-cannot-be-unrestricted-9260771.html
The edited text of a speech on press freedom given by Kantian philosopher Onora O’Neill in 2002.
Philosophy Bites
http://philosophybites.com/2008/04/richard-reeves.html
http://philosophybites.com/2012/12/alan-ryan-on-freedom-and-its-history.html
http://philosophybites.com/2008/05/tim-scanlon-on.html
https://philosophybites.com/2012/04/philip-pettit-on-republicanism.html
Podcast interviews with philosophers Richard Reeves (on the subject of Mill’s On Liberty), Alan Ryan (on freedom and its history), Tim Scanlon (on free speech), and Philip Pettit (on republicanism).
Stanford Encyclopedia of Philosophy
plato.stanford.edu/entries/liberty-positive-negative/
plato.stanford.edu/entries/republicanism/
plato.stanford.edu/entries/berlin/
Entries on positive and negative liberty, republicanism, and Isaiah Berlin.
Forum for Philosophy
https://blogs.lse.ac.uk/theforum/on-free-speech/
https://blogs.lse.ac.uk/theforum/the-ethics-of-nudge/
Discussions of the philosophy and practice of free speech and the ethics of nudging.
Transform Drug Policy Foundation
http://www.tdpf.org.uk/
A UK think tank that campaigns against drug prohibition, and in favour of a policy of control and regulation.