“Capitalist production… disturbs the metabolic interaction between man and the earth… All progress in capitalist agriculture is a progress in the art, not only of robbing the worker, but of robbing the soil; all progress in increasing the fertility of the soil for a given time is progress towards ruining the more long-lasting sources of that fertility… Capitalist production, therefore, only develops the technique and the degree of combination of the social process of production by simultaneously undermining the original sources of all wealth—the soil and the worker.” (Karl Marx).
Marx, Karl. 1976. Capital (vol.1). London: Penguin (p. 637-8)