Pauline Marxist Theory of Sin In memory of Gene Warren, Jr., beloved comrade . Ted Stolze . What is sin for a Marxist? It is inapplicable, irrelevant, null and void. Or so it would seem if we are correct to attribute to Karl Marx and Friedrich Engels a critical theory and, theory of productive and unproductive labour.1 This theory is presented in the three volumes of Capital and in Theories of Surplus Value—Marx’s projected historico-critical fourth volume.2 This seems useful and necessary for several reasons. First, as one of the most suspect legacies of classical political economy,, THECRISISOFTHEEARTH Marx'sTheoryofEcologicalSustainabilityasaNature-Imposed NecessityforHumanProduction JOHNBELLAMYFOSTER Universityoruregon Anysystematic,forward , Marxist philosophy, both in th sense thae t it is about Marxis philosopht y and in the sens thae t it i itsels meanf t to be an instance or example of Marxist philosophy. For this reason, the book has tw Marxiso facest : a face and a philosophica facel . I do no myselt f find the slightes difficultt y in, A social theory offers a political movement an interpretation of the world. It provides a picture of the past, a map of the present, and a forecast of the future. Marxism, in particular, demands that theory and practice remain intimate. The failure of Marxist practice in America thus casts some doubt on the adequacy of the theory itself., .