Margaret Kohn argues for a reappraisal of early twentieth-century left-republican French political theory, known as ‘solidarism’. Solidarism recognises private property as legitimate, but at the same time argues that the collective nature of economic production gives rise to a claim to social property. It is social property that should underlie the case for social justice and social rights, not the standard liberal claims to individual autonomy. This paper provides an appraisal of Kohn’s recovery of solidarism, taking as its main theme (...) the relation between property and social justice. The paper first offers a typology of four theories of justice (right- and left-libertarianism, luck and relational egalitarianism) and discusses the relation of each of these to the concept of property. Then it argues that solidarism is akin to left-libertarianism in the way it formulates justice as a claim to social property. Finally, it argues that solidarists cannot escape grounding their theory in a non-property based fundamental principle, which makes the theory much less distinctive from egalitarian theories of justice than may appear at first sight. (shrink)