E.M. Forster’s imperative to “only connect” has long been read as modernist slogan for the rarefied depth of authentic interpersonal intimacy. Reframing the historical co-emergence of literary modernism and modern social science, this project tells a different story—not of connections between exceptional humans, but of connections between persons and environments. The prevailing canons of modernism have not yet grasped the internal complexity of early-twentieth-century debates regarding the interdependence of human and nonhuman agency. Early-twentieth-century sociologists like Émile Durkheim grounded both the autonomy of human culture and the disciplinary authority of sociology on the premise of species exceptionalism—the independence of hu...