In this sobering book, Barry R. Posen demonstrates how the interplay between conventional military operations and nuclear forces could, in conflicts among states armed with both conventional and nuclear weaponry, inadvertently produce pressures for nuclear escalation. Knowledge of these hidden pressures, he believes, may help some future decision maker avoid catastrophe.Building a formidable argument that moves with cumulative force, he details the way in which escalation could occur not by mindless accident, or by deliberate preference for nuclear escalation, but rather as a natural accompaniment of land, naval, or air warfare at the conventional level. Posen bases his analysis on an empirical study of the east-west military competition in Europe during the 1980s, using a conceptual framework drawn from international relations theory, organization theory, and strategic theory.The lessons of his book, however, go well beyond the east-west competition. Since his observations are relevant to all military competitions between states armed with both conventional and nuclear weaponry, his book speaks to some of the problems that attend the proliferation of nuclear weapons in longstanding regional conflicts. Optimism that small and medium nuclear powers can easily achieve "stable" nuclear balances is, he believes, unwarranted.

Escalation is a natural tendency in any form of human competition, and today's security environment demands that the United States be prepared for a host of escalatory threats. This analysis of escalation dynamics and approaches to escalation management draws on a range of historical examples from World War I to the struggle against global Jihad to inform escalation-related decisionmaking.

The United States, Barry R. Posen argues in Restraint, has grown incapable of moderating its ambitions in international politics. Since the collapse of Soviet power, it has pursued a grand strategy that he calls "liberal hegemony," one that Posen sees as unnecessary, counterproductive, costly, and wasteful. Written for policymakers and observers alike, Restraint explains precisely why this grand strategy works poorly and then provides a carefully designed alternative grand strategy and an associated military strategy and force structure. In contrast to the failures and unexpected problems that have stemmed from America’s consistent overreaching, Posen makes an urgent argument for restraint in the future use of U.S. military strength. After setting out the political implications of restraint as a guiding principle, Posen sketches the appropriate military forces and posture that would support such a strategy. He works with a deliberately constrained notion of grand strategy and, even more important, of national security (which he defines as including sovereignty, territorial integrity, power position, and safety). His alternative for military strategy, which Posen calls "command of the commons," focuses on protecting U.S. global access through naval, air, and space power, while freeing the United States from most of the relationships that require the permanent stationing of U.S. forces overseas.

This book analyzes the evolution of Russian military thought and how Russia's current thinking about war is reflected in recent crises. While other books describe current Russian practice, Oscar Jonsson provides the long view to show how Russian military strategic thinking has developed from the Bolshevik Revolution to the present. He closely examines Russian primary sources including security doctrines and the writings and statements of Russian military theorists and political elites. What Jonsson reveals is that Russia's conception of the very nature of war is now changing, as Russian elites see information warfare and political subversion as the most important ways to conduct contemporary war. Since information warfare and political subversion are below the traditional threshold of armed violence, this has blurred the boundaries between war and peace. Jonsson also finds that Russian leaders have, particularly since 2011/12, considered themselves to be at war with the United States and its allies, albeit with non-violent means. This book provides much needed context and analysis to be able to understand recent Russian interventions in Crimea and eastern Ukraine, how to deter Russia on the eastern borders of NATO, and how the West must also learn to avoid inadvertent escalation.

Surveys how American strategic theorists have understood the nature and character of war in the twentieth century.

Cases of near nuclear use due to misunderstanding demonstrate the importance of the human judgment factor in nuclear decisionmaking. This report applies a risk lens, based on factoring probability and consequence, to a set of cases of near use and instances of sloppy practices from 1962 to 2013.

This report evaluates the potential for further escalation in the conflict in Ukraine, including the prospects for escalation to Russian nuclear use. The report is intended to inform U.S. and NATO policymakers as they consider how to avoid further escalation of the conflict while assisting Ukraine in its efforts to defeat the Russian invasion and to better inform the public debate around these issues.