Articles

Stephen Walt argues for a return to a realism-based U.S. grand strategy.

During the Trump administration, the usual ways of conducting diplomacy have been upended. Many positions in the State Department have never been filled, and meetings with foreign leaders such as Kim Jong-un and Vladimir Putin have been undertaken with little advance planning. What effect are these changes having now, and how will they affect ongoing relationships between the United States and its allies and adversaries?

During the 1990 German reunification negotiations, did the United States promise the Soviet Union that it would not expand NATO into Eastern Europe? Although no written agreement exists, archival materials reveal that U.S. officials did indeed offer the Soviets informal non-expansion assurances, while keeping open the possibility of expansion and seeking to maximize U.S. power in post–Cold War Europe.

"Iran has always been a major power in that region. Under Saddam however, Iran and Iraq were bitter enemies who fought a long war and were strongly opposed to one another. There was almost a rough balance of power between the two countries. By reducing Iraq's power and by allowing the Shia to become the dominant political force in Iraq, the US removed the main country balancing Iran, and helped bring to power a government that has at least some sympathies and links to Iran. So, Iran is by far the main strategic beneficiary of the Iraq War, which made it even more difficult for the US and its allies to deal with the country."

During the Cold War, the threat of a nuclear attack came mainly from the U.S.-Russian nuclear arsenals, writes Kevin Ryan. Today, however, the United States and Russia have been forced to adapt to a new nuclear threat—that of dedicated terrorists with money and technological access who seek to obtain and use a nuclear device.

States use wedge strategies to prevent hostile alliances from forming or to dis­perse those that have formed. These strategies can cause power alignments that are otherwise unlikely to occur, and thus have significant consequences for international politics. How do such strategies work and what conditions promote their success? The wedge strategies that are likely to have significant effects use selective accommodation—concessions, compensations, and other inducements—to detach and neutralize potential adversaries. These kinds of strategies play important roles in the statecraft of both defensive and offensive powers. Defenders use selective accommodation to balance against a primary threat by neutralizing lesser ones that might ally with it. Expansionists use se­lective accommodation to prevent or break up blocking coalitions, isolating opposing states by inducing potential balancers to buck-pass, bandwagon, or hide. Two cases—Great Britain’s defensive attempts to accommodate Italy in the late 1930s and Germany’s offensive efforts to accommodate the Soviet Union in 1939—help to demonstrate these arguments. By paying attention to these dynamics, international relations scholars can better understand how balancing works in specific cases, how it manifests more broadly in interna­tional politics, and why it sometimes fails in situations where it ought to work well.

Realist scholars have long debated the question of how much power states need to feel secure. Offensive realists claim that states should constantly seek to increase their power. Defensive realists argue that accumulating too much power can be self-defeating. Proponents of hegemonic stability theory contend that the accumulation of capabilities in one state can exert a stabilizing effect on the system. The three schools describe different points along the power con­tinuum. When a state is weak, accumulating power increases its security. This is approximately the situation described by offensive realists. A state that con­tinues to accumulate capabilities will eventually triggers a balancing reaction that puts its security at risk. This scenario accords with defensive realist as­sumptions. Finally, when the state becomes too powerful to balance, its oppo­nents bandwagon with it, and the state’s security begins to increase again. This is the situation described by hegemonic stability theory. These three stages delineate a modified parabolic relationship between power and secu­rity. As a state moves along the power continuum, its security increases up to a point, then decreases, and finally increases again. This modified parabolic re­lationship allows scholars to synthesize previous realist theories into a single framework.