Alastair Iain Johnston (PhD University of Michigan, 1993) is the Gov. James Albert Noe and Linda Noe Laine Professor of China in World Affairs in the Government Department at Harvard University. He has written on socialization theory, identity and political behavior, and strategic culture, mostly with application to the study of East Asian international relations and Chinese foreign policy. Recently he has become interested in the effects of social media on inter-state security dilemmas. Johnston is the author ofCultural Realism: Strategic Culture and Grand Strategy in Chinese History (Princeton 1995) and Social States: China in International Institutions, 1980-2000(Princeton University Press, 2008), and is co-editor of Engaging China: The Management of an Emerging Power (Routledge 1999), New Directions in the Study of China’s Foreign Policy (Stanford 2006), Crafting Cooperation: Regional Institutions in Comparative Perspective (Cambridge 2007), Measuring Identity: A Guide for Social Scientists (Cambridge 2009), and Perception and Misperception in American and Chinese Views of the Other (Carnegie Endowment for International Peace 2015).