Kimberly Marten outlines how U.S. policymakers can deter Russian aggression with robust support for NATO, while reassuring Russia of NATO’s defensive intentions through clear words and actions based in international law.

Overview This January brought a stark reminder of the perils of European dependence on Russian natural gas. A cutoff of supplies connected in part to a pricing dispute between Russia and Ukraine, …

Overview When NATO's founding members signed the North Atlantic Treaty on April 4, 1949, they declared themselves "resolved to unite their efforts for collective defense and for the preservation o…

The United States has failed to elevate Russia’s intervention in U.S. elections to the national priority that it is, and it has neglected to respond to it in a way sufficient to deter future attacks,…

Overview The basis of nuclear doctrine during the Cold War was deterrence. Nuclear powers were deterred from attacking each other by the fear of retaliation. Today, much of the concern over possib…