Joshua Busby is a Professor in the LBJ School of Public Affairs at the University of Texas-Austin. From 2021-2023, he served as a Senior Advisor for Climate at the U.S. Department of Defense. His most recent book is States and Nature: The Effects of Climate Change on Security (Cambridge, 2023). He is also the author of Moral Movements and Foreign Policy (Cambridge, 2010) and the co-author, with Ethan Kapstein, of AIDS Drugs for All: Social Movements and Market Transformations (Cambridge, 2013). His main research interests include transnational advocacy and social movements, international security and climate change, global public health and HIV/ AIDS, energy and environmental policy, and U.S. foreign policy.