Jeffrey D. Sachs is a university professor and director of the Center for Sustainable Development at Columbia University, where he directed The Earth Institute from 2002 until 2016. He is also president of the U.N. Sustainable Development Solutions Network and a commissioner of the U.N. Broadband Commission for Development. He has been advisor to three U.N. secretaries-general, and currently serves as an SDG Advocate under Secretary-General Antonio Guterres. Sachs is the author, most recently, of A New Foreign Policy: Beyond American Exceptionalism (2020). Other books include Building the New American Economy: Smart, Fair, and Sustainable (2017) and The Age of Sustainable Development, (2015) with Ban Ki-moon.