From biology to economics to information theory, the theme of interdependence is in the air, framing our experiences of all sorts of everyday phenomena. Indeed, the network may be the ascendant metaphor of our time. Yet precisely because the language of interdependence has become so commonplace as to be almost banal, we miss some of its most surprising and far-reaching implications. In Interdependence, biologist Kriti Sharma offers a compelling alternative to the popular view that interdependence simply means independent things interacting. Sharma systematically shows how interdependence entails the mutual constitution of one thing by another—how all things come into being only in a system of dependence on others. In a step-by-step account filled with vivid examples, Sharma shows how a coherent view of interdependence can help make sense not only of a range of everyday experiences but also of the most basic functions of living cells. With particular attention to the fundamental