Both Marx and Rousseau are “anti-history” in the sense that socioeconomic and sociopolitical large, complex organization, well beyond the small groups of prehistoric homo sapiens people living a sustenance existence, has alienated workers from themselves (Marx) and introduced artificial, or “moral,” inequalities and inauthentic fronts (Rousseau). In other words, the human condition in the modern world is not a story of progress; paradoxically, things have gotten worse in spite, and indeed in part due to the extent of technological progress. In other words, under the subterfuge (i.e., camouflage) of “progress,” the species has actually acquiesced to increasing decadence and deterioration as human organization has become larger and more complex.
The full essay is at "Marx and Rousseau on Economic Inequality"