Seth D. Kaplan is a leading expert on fragile states and the author of “Fragile Neighborhoods: Repairing American Society, One Zip Code at a Time.” He is a Professorial Lecturer in the Paul H. Nitze School of Advanced International Studies (SAIS) at Johns Hopkins University, Senior Adviser for the Institute for Integrated Transitions (IFIT), and consultant to multilateral organizations such as the World Bank, U.S. State Department, U.S. Agency for International Development, and OECD as well as developing country governments and NGOs.