This paper applies a more-than-human, relational, new materialist ontology to ask the Deleuzian question: what does capitalism actually do? The transactions identified in Marx’s Capital are re-analysed as more-than-human assemblages, constituted by affective flows involving both human and non-human matter. The paper then identifies further more-than-human affects that produce the fluctuations in prices and quantities of goods sold, described in classical economics as the ‘laws of supply and demand’. Analysis reveals these affects to be associated with the affective and relational capacities of commodities. The consequences of this more-than-human ontology of capitalism are explored by means of a short case study of the digital economy. This...