Free Speech Debate, based at the University of Oxford, has produced more than 70 articles, videos and discussion pieces that specifically address hate speech. Contact Timothy Garton Ash.

Article 19 is a London-based human rights organization that focuses on freedom of expression. The organization has offices around the world, and a section of its website addresses hate speech.

Index on Censorship is a campaigning and publishing organization based in London that focuses on freedom of expression. The organization regularly reports on hate speech. Contact: Chief Executive Jodie Ginsberg

Susan Benesch is director of the Dangerous Speech Project and a faculty associate of the Berkman Center for Internet and Society at Harvard University. She also teaches human rights at American University’s School of International Service.

Andrea Gittleman is the program manager for the Center for the Prevention of Genocide at the U.S. Holocaust Memorial Museum.

Dr. Agnès Callamard is director of the Global Freedom of Expression Project at Columbia University in New York City and former executive director of Article 19 in London.

Les Green is professor of the philosophy of law at Balliol College, Oxford. He is working on a book about “right speech” and argues that Buddhist ideas about avoiding divisive, abusive and false speech can help us live together well in free societies.

Cherian George is an associate professor at Hong Kong Baptist University School of Communication and director of the Asia Journalism Fellowship in Singapore. He has written extensively on hate speech and ethical media.

Matt Schissler is an adviser to the civil society group Paung Ku, a member organization of the Panzagar anti-hate speech campaign in Myanmar.