"Labor is not the source of all wealth. Nature is just as much the source of use values (and it is surely of such that material wealth consists!) as labor, which itself is only the manifestation of a force of nature, human labor power. The above phrase (“labor is the source of all wealth and all culture”) is to be found in all children’s primers and is correct I so far as it is implied that labor is performed with the appurtenant subjects and instruments. But a socialist program cannot allow such bourgeois phrases to pass over in silence the conditions that alone give them meaning. And in so far as man from the beginning behaves toward nature, treats her as belonging to him, his labor becomes the source of use values, therefore also of wealth. The bourgeoisi have very good grounds for falsely ascribing supernatural creative power to labor; since precisely form the fact that labor depends on nature it follows that the man who possess no other property than his labor power must, in all conditions of society and culture, be the slave of other men who have made themselves the owners of the material conditions of labor."