Capital accumulation is the fundamental part of a capitalist economy; it is the dynamic that motivates the pursuit of profit at the expense of the workers who produce the good or service:
Monthly Review | Grand Theft Capital: The Increasing Exploitation and Robbery of the U.S. Working Class
"Capitalism has always been based on the expropriation of land, resources, and human lives in order to create the conditions for the exploitation of labor.
"The Industrial Revolution, as Karl Marx indicated in the nineteenth century, was made possible by means of the brutal enclosure of the commons in England together with the even more barbaric colonization abroad carried out by the European powers, encompassing 'the discovery of gold and silver in the Americas, the extirpation, enslavement, and entombment in mines of the indigenous population of those continents, the beginnings of the conquest and plunder of India, and the conversion of Africa into a preserve for the commercial hunting of blackskins.'"