FNRS Senior Research Associate and Professor at the University of Liege, Belgium, and at Paris I Pantheon Sorbonne, France. He is the author or editor of, among other publications, Epistémologie de la Sociologie (with Marc Jacquemain, 2008), Le Nouvel Esprit Solidaire (2009), Le Tournant de la Théorie Critique (2015), Everyday resistance (with Marc Jacquemain, 2019) and La Fabrique de l'émancipation l’émancipation (with Jean-Louis Laville, to come in 2022).