Juan Domingo Sánchez Estop is an associated researcher of the Cercle de Philosophie of the Université Libre de Bruxelles (ULB). A former student of Universidad Complutense de Madrid, then Professor of Philosophy at the same University, Juan Domingo Sánchez Estop has worked and published on Althusser, Spinoza, Marxism and Materialist Philosophy. He is the author of La dominación liberal (2009), under the pseudo "John Brown"; Althusser et Spinoza, détours et retours (2022); and of a Spanish translation of Spinoza's Correspondence, Spinoza, Correspondencia completa, (1986) and the Political Treatise (forthcoming). He contributed chapters to Althusser and Law (2013) and Spinoza's Authority (2017), along with numerous articles on Spinoza, Althusser, early modern philosophy and philosophical materialism. He is a member of the Editorial Board of the reviews Demarcaciones and Décalages, both devoted to Althusserian studies and of the Mexican review Círculo spinoziano. He is also a member of the Directive Board of the Seminario Spinoza de España.