International Security & Defense

This piece is a series in the Defense, Emerging Technology, and Strategy (DETS) Program’s analysis on the war in Ukraine, including a corresponding policy brief on Ukraine’s Battlefield Technologies and Lessons for the U.S. published in July 2023. 

The half-century since the official demise of the Bretton Woods system of fixed exchange rates has shown the benefits of what replaced it. While some may feel nostalgic for the postwar monetary system, its collapse was inevitable, and what looked like failure has given rise to a remarkably resilient regime.

The United States tends to react to unexpected events with a combination of fear, political recrimination, and bravado—not a particularly effective mix when it comes to evaluating and responding to potential crises. Despite widespread expressions of concern, some warranted and some hyperbolic, the Chinese surveillance balloon spotted over Montana (and tracked across the country before a fighter jet shot it down over the Atlantic) did not represent a crisis. In fact, it was a gift from Beijing: a necessary wake-up call about the shortcomings in the United States’ national defense. 

Last week, U.S. Sen. Joe Manchin seemingly dashed Democrats’ hopes for congressional action to slow climate change. Sen. Bernie Sanders accused Manchin of “sabotag[ing] the president’s agenda”; Rep. John Yarmuth, when asked about the consequences of Congress not acting on climate change, said, “We’re all going to die”; and climate activists, as well as some Democrats in Congress, wondered if Manchin should be removed as chair of the Senate Energy and Natural Resources Committee.

The costly Ground-based Midcourse Defense system remains unproven and unreliable in deterring North Korea’s threat to use intercontinental ballistic missiles. An airborne boost-phase intercept system may offer an alternative defense against North Korea without threatening Russian or Chinese deterrents.

Russia’s belligerence against Ukraine is underscoring once again the inextricable link between national security and energy security. Today, Russia is flexing its energy dominance over a dependent Europe. But tomorrow, the danger may come from China and its control over the raw materials that are key to a clean energy future.

The United States and its allies must ensure that doesn’t happen.

The U.S. should accept with humility its inability to fully eliminate terrorism. Specifically, U.S. policy must balance “ends, ways, and means;” establish clear and achievable objectives; adopt efficient, effective, and resource-sustainable strategies; ensure synchronization of diplomatic and military efforts; build alliances to share the burden of countering terrorism; and leverage cooperative mechanisms and regional partnerships to increase the capacity and willingness of regional states to defend their sovereignty and contribute to multinational coalitions against terrorism.  A balanced, integrated, and synchronized strategy encompassing defense, diplomacy, economic, and humanitarian assistance lines of effort should be cornerstone of a revamped foreign policy in the coming decades.

The Economic Diplomacy Initiative (EDI) at the Belfer Center for Science and International Affairs is presenting a first-of-its-kind analysis of the makeup of the Commerce Department’s Entity List, by country, by sector, and by year of addition. Starting with raw data made available by the Commerce Department, we manually grouped blacklisted sub-entities at the parent level to give a clearer view of the companies targeted by export controls. While  the Entity List does not include industry tags, we used Federal Register announcements and secondary research to manually assign industry sectors to each entity. The analysis provides a quantitative review of the evolving use of the entity list to shed light on shifting aims of US economic and national security policy.

Tongfi Kim and Andrew Taffer respond to Ketian Zhang’s summer 2019 article, “Cautious Bully: Reputation, Resolve, and Beijing's Use of Coercion in the South China Sea.”

Even as the novel coronavirus pandemic nears its peak, defense analysts are beginning to assess how the global spread of this deadly disease should change how we think about warfare.