Critically engaging the work of Immanuel Kant, Hannah Arendt, Martin Heidegger, and Jacques Derrida together with her own observations on contemporary politics, environmental degradation, and the pursuit of a just and sustainable world, Kelly Oliver lays the groundwork for a politics and ethics that embraces otherness without exploiting difference. Rooted firmly in human beings' relationship to the planet and to each other, Oliver shows peace is possible only if we maintain our ties to earth and world. Oliver begins with Immanuel Kant and his vision of politics grounded on earth as a finite surface shared by humans. She then incorporates Hannah Arendt's belief in plural worlds constituted through human relationships; Martin Heidegger's warning that alienation from the Earth endangers not only politics but also the very essence of being human; and Jacques Derrida's meditations on the singular worlds individuals, human and otherwise, create and how they inform the reality we inhabit. Each of these theorists, Oliver argues, resists the easy idealism of world citizenship and globalism, yet they all think about the earth against the globe to advance a grounded ethics. They contribute to a philosophy that avoids globalization's totalizing and homogenizing impulses and instead help build a framework for living within and among the world's rich biodiversity.