In 2005 he publishedImpérialisme humanitaire. Droits de l’homme, droit d’ingérence, droit du plus fort ?, published in English asHumanitarian Imperialismin 2006.
In 2006, he wrote the preface toL'Atlas alternatif- Frédéric Delorca (ed), Pantin, Temps des Cerises. He is a member of the Division of Sciences of the Royal Academy for Sciences, Letters and Arts of Belgium.
In 2007, he wrote an article in French discussing the possibility of a US invasion of Iran.