The eighteenth century was the century of self-organization, but also that of materialism, inasmuch as it was then that certain thinkers proclaimed themselves to be materialists (rather than just being labelled as such by enemies of various sorts). If one seeks to read these two features – one hesitates to call them ‘facts’ or ‘events’ – together, one arrives rather quickly at an influential metaphor, the beeswarm. But a metaphor of or for what? Irreducible organic unity, most broadly – (...) spelled out in the vocabulary of the period in terms of synergy, sympathy and sensibility, but also of cohesion, consensus and conspiration: individual bees have their characteristics, their intentions, and their own purposes, but they also ‘conspire’, ‘cohere’ and ‘consent’ in the name of a larger living unity, the swarm, although this leaves open further questions such as the exact nature of the order or organization yielded or enacted by the swarm (bottom-up? top-down? emergent? etc.). The fascination with the beeswarm is a fascination with organic unity and in some cases (notably Diderot), with the organic or organismic features of living matter itself. This is the story we wish to tell. (shrink)