Critical criminology and radical constructivism are frequently regarded as an impossible pair-or, at least, as a rather schizophrenic one. This is so, notably, because radical constructivism rests on the (paradoxical) abandonment of what Jean-François Lyotard named méta-récits. It rests on the refusal to distinguish between the phenomenal and the symbolic, and thus implies the complete vanishing of the classical difference between ontology and epistemology. This would consequently deprive criminology (or, more generally, the social sciences) of any anchoring point enabling a critical utterance. The present contribution's thesis is that, on the contrary, radical constructivism can catalyze critical criminology. Among the possible contributions of a radically constructivist sociology of criminalization, this paper focuses on: its call for a reworking of the concept of social control, which avoids problems related to its contemporary usage; its focus on power and force, in a way which avoids Foucaultian perspectives' aporetic elements, and problematizes every instance of legitimized authoritarian practices.The diversity of the forms taken by critical criminology can be observed everywhere on a long continuum between the highly abstract universes that theoretical architects create, and the heavily concrete arenas in which activists sweat and scream. Such plurality led some to suggest that there are as many forms of critical criminology as there are criminologists labelling themselves as critical (e.g. Schwartz and Hatty 2003:ix). The internal differentiation of critical criminology, as well as the very production of the boundaries of the critical realm within criminology, is nevertheless far from being chaotic. Despite its internal differentiation, critical criminology presents a unity that is constantly produced and reproduced through an array of strategies that we use to distinguish ourselves from 'conventional', 'mainstream', 'administrative', or 'orthodox' criminology. These strategies are distributed along theoretical, empirical, methodological and epistemological axes. Mobilizing different theories (Marxist, feminist, neo-Foucaultian, etc.), placing the N. Carrier (