I read a lot of Marx in my "revolutionary youth" (and have condensed the voluminous "Das Kapital" into: "you'll never get rich from your own work" <g>), but do not remember that route to Capitalism demise. He was more a Hegelian in that respect, namely: "Every system has within it the seeds of its own destruction". I think his route to Capitalism's demise was the conversion of agrarian masses to proletariat by the capitalistic system followed by the rising of the proletariat to overthrow capitalism which gave it birth. This was more a "moral stance" in view of the mid 19th century form of extremely exploitative capital (sweat shops, child labor and the stench of death in mines and iron works).