Relying on the perspective of a “global” Marx, which emphasizes the need to avoid separating the various levels of his theoretical and practical engagement with historical reality, this essay raises three key questions to Michael Heinrich’s Die Wissenschaft vom Wert. The first concerns the Marxian concept of science and its inherent connection to the class struggle. The second challenges the priority Heinrich places on the worker as a self-interested individual and poses the problem of its relation to the workers as a collective. The third addresses social reproduction, questioning the link Heinrich establishes between the historical preconditions of capital and its fully developed form.