Mary Kaldor is professor of global governance and director of the Civil Society and Human Security Research Unit in the Department of International Development at the London School of Economics. She is the coeditor of The Quest for Security: Protection Without Protectionism and the Challenge for Global Governance (Columbia, 2013, with Joseph Stiglitz) and the author of New and Old Wars: Organized Violence in a Global Era (2012, third edition) and Global Security Cultures (2018) among other works.

Saskia Sassen is the Robert S. Lynd Professor of Sociology and a member of the Committee for Global Thought at Columbia University. She is the author of many books, including Expulsions: Brutality and Complexity in the Global Economy (2014), The Global City (2001, second edition), and Cities in a World Economy (2018, fifth edition).