Sustainable Knowledge rethinks the nature of interdisciplinary research and the place of philosophy and the humanities in society and offers a new account of what is at stake in talk about 'interdisciplinarity'.1. Introduction 2. Disciplinarity 3. Interdisciplinarity 4. Sustainability 5. Dedisciplinarity 6. Epilogue: An Undisciplined LifeRobert Frodeman is Professor of Philosophy and Director of the Center for the Study of Interdisciplinarity at the University of North Texas, USA