Adam Smith's account of primitive-original accumulation depicted a peaceful process, in which some workers laboured more diligently than others and gradually built up wealth, eventually leaving the less diligent workers to accept living wages for their labour. Karl Marx rejected this explanation as "childishness", instead stating that, in the words of David Harvey, primitive accumulation "entailed taking land, say, enclosing it, and expelling a resident population to create a landless proletariat, and then releasing the land into the privatised mainstream of capital accumulation". This would be accomplished through violence, war, enslavement, and colonialism.