Serge Thion (born 1942) is a French sociologist. A former researcher at the French National Center for Scientific Research, he was dismissed from his position there for Holocaust denial activities.
Thion worked as a researcher at the French National Centre for Scientific Research (CNRS) from 1971 to 2000. Most of his research there focused on Cambodia and Vietnam. Thion was the subject of some controversy when he wrote that "genocide" was, technically, not a proper description of what happened in Cambodia during the Khmer Rouge rule, because it was not a type (or an attempt) of killing based on purely ethnic grounds. According to Thion:
The reality is that genocide, massacres, wiping out entire peoples or cultures, and other inhuman atrocities, torture, massive corruption, and so on, are part and parcel of government policies, most usually applied to foreign countries. There is no other law than the law of the jungle. If we want to change this situation, we must reform our own laws first, strip the authorities of their political immunity, abolish the "Reason of State" and the system of official secrecy which covers up all these crimes. If we could reach a stage in which any official would be tried according to the same rules that apply to you and me, to any other ordinary human being, we would not need all these extraordinary concepts because common law is quite enough.
I of course fully agree that Pol Pot should be prevented by any means from returning to power. I find it a bit paradoxical that so much blame was poured on the Vietnamese, who did just that, prevent Pol Pot from coming back, by people who did so much to promote the same Pol Pot and insisted he kept his seat in the United Nations. I am also fully in favour of a trial of Pol Pot and of his accomplices and his foreign associates, including American, Thai and Chinese officials who conspired to support him when he was in power and after his fall. I suggest the application of the ordinary Cambodian law for events which took place in Cambodia.Genocide is nothing else but a political label aiming at the exclusion of a political leader or party beyond the bonds of humanity. It leads us to believe we are good, that we have nothing to do with these monsters. This is entirely misleading. Pol Pot has been produced by our political world, is part of it, is using it and is getting strong from it. Before saying he is dirty - which is what he is without a doubt - we should clean our own house first. 
In 1993 Thion privately published Une Allumette sur la banquise (A Matchstick on an Ice Flow). The book criticized what he perceived as sensationalization of the Holocaust compared to other mass deaths since World War II. He also criticized the prosecution of Robert Faurisson for Holocaust denial, and cast doubt on the accuracy of Filip Müller's book Eyewitness Auschwitz.[better source needed]. He met Noam Chomsky during the 70's and presented his editor Pierre Guillaume for publication.
Thion has been described as a Holocaust denier, and in November 2000 was dismissed from CNRS for Holocaust denial activities. He was condemned and fined for defamation by the French Correctional Tribunal Court of Appeal in December 2002 for attacks on writer Didier Daeninckx. Thion attended the 2006 International Conference to Review the Global Vision of the Holocaust in Iran, often described as a Holocaust denial conference. Israeli philosopher Elhanan Yakira has cited Thion and his friend Alain Guionnet, as one of a number of deniers on the radical left (and right) in France whose extreme views on the Holocaust have made Holocaust denial "a central issue in France and elsewhere".
- "His Holocaust denial activities led the CNRS to fire him in November 2000. one of his critics was the writer Didier Daeninckx. Thion's attacks on Daenincks led to a Correction Tribunal Court of Appeal to condemn him on December 4, 2002, for defamation and fined him." Stephen E. Atkins. Holocaust Denial as an International Movement, ABC-CLIO, 2009, p. 96. ISBN 978-0-313-34538-8
- "Serge Thion is a French sociologist who has gained infamy as a Holocaust Denier. Thion was fired from his position with the French National Centre for Scientific Research in 2000 for remarks denying the Holocaust." Dr. Harold Brackman and Aaron Breitbart, PDF (719 KiB) , Simon Wiesenthal Center, April 2007, p. 40. Retrieved May 27, 2007.
- Thion, Serge (23 November 1995). "Does The Cambodian Case Fit The Requirements Of The Genocide Convention?". Retrieved 19 May 2015.
- Serge Thion (1993) Une Allumette sur la banquise
- "Serge Thion is a Holocaust denier with close connections to Pierre Guillaume and La Vieille Taupe. He was born in 1942." Stephen E. Atkins. Holocaust Denial as an International Movement, ABC-CLIO, 2009, p. 95. ISBN 978-0-313-34538-8
- "a transnational ultra-leftist movement based in Italy and supported by orthodox Communists as well as by Holocaust denier Serge Thion." France - 2004, Stephen Roth Institute, Antisemitism and Racism, Annual Reports, Country Reports. Retrieved May 27, 2007.
- "A number of radical leftists in France are intimately connected to Holocaust denial. They include Serge Thion, who is a defender of both Rassinier and Faurisson. Thion is linked with the Marxist publishing house "La Vieille Taupe" (The Old Mole), founded by Pierre Guillaume." Holocaust Denial Today, Part VI, Manuel Prutschi, Canadian Jewish Congress, Nizkor Project. Retrieved May 27, 2007.
- "...Serge Thion and Pierre Guillaume, who are both prolific holocaust—deniers in their own right." Rachel Neuwirth, The Chomsky File, American Thinker, January 6, 2005. Retrieved May 27, 2007.
- "He was prominent at the Iranian Holocaust Denial Conference on December 11, 2006, in Tehran, Iran, sponsored by Iran President Mahmoud Ahmadinejad." Stephen E. Atkins. Holocaust Denial as an International Movement, ABC-CLIO, 2009, p. 96. ISBN 978-0-313-34538-8
- "A French sociologist and associate of Robert Faurisson, Serge Thion has described the Holocaust as a "religion" that was "pushed by Zionists to attract capital, as well as political and military protection." Conference Attendees: A Who's Who of Hate, Iran Hosts Anti-Semitic Hatefest in Tehran, Anti-Defamation League, December 14, 2006. Retrieved May 27, 2007.
- Alvin H. Rosenfeld. The End of the Holocaust, Indiana University Press, 2011, pp. 241–242. ISBN 978-0-253-35643-7