Locke abandoned the Doctrine of Economic Justice and replaced it with an analysis of the conditions that yield the justice of property rights. To which Marx, the Socialists, (and their predecessors) retorted: let us rather analyze the injustices of property rights. These are the contours within which the legal, social, economic, and political discourse has been carried out during the last few centuries. We might get out of this chasm, through an analysis in three parts. In Part I, we outline three fundamental mistakes in Marx’s analysis; in Part II, we analyze the existence and conditions of economic rights as generators of just property rights; in Part III, we complete the Theory of Economic Justice by adding the plank of Participative Justice to the two traditional planks of Distributive Justice and Commutative Justice.