B. L. Turner II is Regents’ Professor and Gilbert F. White Professor of Environment and Society at Arizona State University. A geographer and human-environmental scientist, he has engaged in research on a wide range of topics across the human–environment relationship and sustainability. He is a member of the National Academy of Sciences (US), American Academy of Arts and Sciences, American Philosophical Society and a Fellow of the American Association for the Advancement of Science and the Association of American Geographers.