Original Article Science & Society 2025, Vol. 0(0) 1–24 © The Author(s) 2025 Article reuse guidelines: sagepub.com/journals-permissions DOI: 10.1177/00368237251334194 journals.sagepub.com/home/sso Marx and Socially Necessary Labor Time. On the Content and Form of the Quantitative Determination of Value Gastón Caligaris 1 , Alejandro Fitzsimons 1 , and Guido Starosta 1 Abstract This article revisits the debates on socially necessary labor-time (SNLT) in the light of contemporary discussions of Marx´s value-theory, which have tended to move from a rather narrow focus on the explanation of the economic basis of the exploitation of wage-workers, to a wider critical inquiry into the social constitution of alienated forms of mediation that structure capitalist society. Moreover, this re-examination of SNLT draws on a novel reading of the textual evidence offered by the critical edition of the manuscripts for Capital, against the backdrop of a brief overview of the controversies between the three main interpretations which can be found in the literature, and the development of an alternative systematic-dialectical presentation of the constitution of the con- tent and concrete forms of realization of the quantitative determination of value. Keywords socially necessary labor time, market value, solvent demand, Marxist debate, value theory Received: 11 March 2024; accepted: 11 March 2024 1 Department of Economics and Management, National University of Quilmes, Bernal, Argentina Corresponding Author: Guido Starosta, Department of Economics and Management, National University of Quilmes, Roque S´ aenz Peña 352, 1876BXD, Bernal, Buenos Aires, Argentina. Email: guido.starosta@unq.edu.ar