Thierry Meyssan

Thierry Meyssan is a French conspiracy theorist, journalist, and left-wing political activist.

He is the author of investigations into the extreme right-wing, particularly France's National Front militias, as well as into the Catholic church.

Meyssan's book 9/11: The Big Lie (L'Effroyable imposture) challenges the official account of events of the September 11 terrorist attacks.

Publication of The Big Lie In 2002, he published a book on the September 11 terrorist attacks, with the English translation titled 9/11: The Big Lie. Meyssan argued that the attacks were organized by a faction of the US military–industrial complex in order to impose a non-democratic regime in the United States and to extend US imperialism. It is one of "the first wave of book-length conspiracy speculations" in France and Germany about 9/11.

A follow-up to his first book titled L’effroyable Imposture II (The Big Lie 2) accused Israel of carrying out the assassination of Rafic Hariri.

Response French media quickly dismissed the contents of the book, and a Pentagon spokesperson also deprecated the book.

Works La Protection des homosexuels dans le droit européen de Collectif, Projet Ornicar éd. (Paris), 1993. L'Intégration des transsexuels de Collectif, Projet Ornicar éd. (Paris), 1993. Charles Millon, le porte-glaive de Collectif, Golias (Lyon), 1999. L'Énigme Pasqua, Golias (Lyon), 2000. Terrorisme en soutane : Jean-Paul II contre l'IVG par le Réseau Voltaire pour la liberté d'expression, L'Esprit frappeur (Paris), 2000. 9/11 The Big Lie, Carnot Publishing (London), 2002. Pentagate, USA Books (New York), 2002. Os Senhores da Guerra, Frenesi (Lisboa), 2002. Foreword (with Jean Ziegler), Le Cartel Bush, Timéli (Genève), 2004. Politicamente Incorrecto, postface by Fidel Castro, Ciencias sociales (Cuba), 2004. Foreword (with José Saramago), El Neron del siglo XXI, Apostrofe (Madrid), 2004. L'Effroyable imposture 1 & Le Pentagate, Nouvelle édition annotée, Demi-lune (Paris), 2007. Resistere alla menzogna in Zero, Perché la versione ufficiale sull'11/9 è un falso (avec Giulietto Chiesa), Piemme (Milan), 2007. L'Effroyable imposture 2. Manipulations et désinformation, Editions Alphée-Jean-Paul Bertrand (Paris), 2007. Before Our Very Eyes, Fake Wars and Big Lies: From 9/11 to Donald Trump, Progressive Press, 2019,