Eugene Rumer, a senior associate and director of the Russia and Eurasia Program at the Carnegie Endowment for International Peace, and Rajan Menon, a professor of political science at the  City College of New York, senior research scholar at the Saltzman Institute of War and Peace Studies, Columbia University, the author of The End of Alliances, and the co-author of Conflict in Ukraine: The Unwinding of the Post--Cold War Order (The MIT Press, 2015), offer historical context on the Russian/Ukraine conflict and talk about what's at stake for both countries and the West.