Paolo Virno is an Italian philosopher, semiologist, and activist. A prominent figure among the Italian workerist thinkers, he teaches at the University of Rome and is the author of A Grammar of the Multitude and Multitude between Innovation and Negation, both published in English by Semiotext(e).

Lorenzo Chiesa is Director of the Genoa School of Humanities and the author of Subjectivity and Otherness: A Philosophical Reading of Lacan and The Not-Two: Logic and God in Lacan, both published by the MIT Press.