STS has been a very fertile field over the past couple of decades, most radically perhaps in conjuring up new ontological visions, new sorts of pictures of what the world is like, what sorts of things there are in it and how they relate to one another. The theorists of the actor-network, Bruno Latour, Michel Callon, et al, led the way, with their image of a squirming morass of human and nonhuman hybrids morphing between the micro and the macro (Callon and Latour 1981). But sooner or later, the question had to come up: so what? Surely something should follow from these drastic ontological reconceptualizations. Having understood the world differently, something should follow for how we conduct our affairs in it.