Foreign Affairs - The Rise of U.S. Nuclear Primacy - Keir A. Lieber and Daryl G. Press

Summary: For four decades, relations among the major nuclear powers have been shaped by their common vulnerability, a condition known as mutual assured destruction. But with the U.S. arsenal growing rapidly while Russia's decays and China's stays small, the era of MAD is ending -- and the era of U.S. nuclear primacy has begun.