Articles

In this Q&A, Joseph S. Nye talks about his advice for the interim and future president of Harvard in the wake of Claudine Gay's resignation, which countries should be highest on our radar to prevent the threat of nuclear war, what role the U.S. should play in the Russia-Ukraine war, the significance of U.S. alliances in the Middle East, and more.

The Houthis' strategic behaviour and communications indicate that they have attempted to succeed against Saudi Arabia in the same way that Hizbullah has succeeded against Israel: to harness their long-range missiles as a means of subjecting their stronger opponents to limitations and 'rules of the game.' So far, the Houthis have been far less successful than Hizbullah. Nevertheless, the Houthis have become an integral part of the Iran-led 'axis of resistance.'

Many accounts of the formation of American and British grand strategy during World War II between the fall of France and the Pearl Harbor attacks stress the differences between the two sides’ strategic thinking. These accounts argue that while the Americans favored a 'direct' Germany-first approach to defeating the Axis powers, the British preferred the 'indirect' or 'peripheral' method. However, a review of Anglo-American strategic planning in this period shows that before official U.S. wartime entry, both sides largely agreed the British 'peripheral' approach was the wisest grand strategy for winning the war.

When the U.S. military trains other states’ forces, it tries to impart liberal norms such as respect for human rights. But when liberal norms clash, these soldiers prioritize loyalty to their unit, the military, and shared goals.

Rather than revolutionizing war, drones demonstrate its evolution. The principle of air warfare remains avoiding exposure to the enemy. Drones are unlikely to shift the offense-defense balance toward the offense because they are vulnerable to attacks from the ground and air.

When winning rebels face intense security threats during civil wars, rebel field commanders are more likely to remain obedient during war-to-peace transitions because they have less incentive to challenge newly installed rulers and less capacity to mobilize supporters outside the postwar military hierarchy.

The regime built around the 1970 Treaty on the Non-Proliferation of Nuclear Weapons (NPT) has helped curtail the spread of nuclear arms for fifty years. In hindsight, it is remarkable only nine states possess the world’s most powerful weapon. The NPT achieved much success during Cold War bipolarity and U.S. unipolarity in its aftermath. But today, China’s rise and Russia’s resurgence have ushered in a new era of emerging multipolarity. Can the treaty withstand the potential challenges of this dynamic environment? There is a real risk that multipolarity may shake the scaffolding of the nonproliferation regime, presenting a significant test to the NPT’s durability. This article identifies four essential elements of the nonproliferation regime: widespread membership, adaptability, enforcement, and fairness. History suggests bipolarity and unipolarity in the international system largely sustained and promoted these NPT features. When international regimes lack such elements, it sharply curtails their long-term efficacy.

States frequently acquire proof that other states have violated norms. Yet, existing theories do not fully explain how states wield such proof to coerce wrongdoers. Four case studies of nuclear proliferation probe a novel theory of how states coerce norm violators by concealing, sharing privately, or publicizing proof of guilt.

Wedge strategy theory explains how states use strategic arms control to divide adversaries by affecting their trust, threat perceptions, and beliefs about a commitment’s trade-offs. Examining three landmark arms control negotiations shows how the wedge motive was a key component to these negotiations.

White Southerners opposed to Reconstruction used violence to undermine Black political power and force uncommitted white Southerners to their side. Although structural factors made it harder for the U.S. government to suppress this violence, a series of policy failures prompted Reconstruction’s failure and generations of injustice.