Theodore R. Schatzki is Professor of Geography, and of Philosophy and Sociology, at the University of Kentucky, USA. He is the author of Social Practices, The Site of the Social, Martin Heidegger: Theorist of Space, and The Timespace of Human Activity. He is also co-editor of, among other works, The Practice Turn in Contemporary Theory, The Nexus of Practices, and Questions of Practice in Philosophy and Social Theory.