International Security & Defense

Dozens of in-depth interviews in Lebanon after its civil war show how wartime displacement transformed localities in ways that transcend religious identity. With more than 80,000 people displaced from southern Lebanon because of fighting since October 7, 2023, the Israel-Gaza war is likely to strengthen Hezbollah’s grip when the displaced populations return and in localities in south Lebanon where displaced populations settle. 

Christopher Darnton responds to Rachel Metz's Winter 2022/23 article, "The Cult of the Persuasive: Why U.S. Security Assistance Fails."

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. 

Calder Walton says both seek to topple the United States from atop world stage, with China's blend of money, influence, all-hands-on-deck approach posing the greater threat.

Stephen Walt analyzes the priority that the United States should place on competing with China by asking and answering five questions.

Climate disasters shape the trajectory of internal conflicts in states highly vulnerable to changes in conflict dynamics. Conflict after a climate disaster escalates when the disaster induces shifts in relative power that enable one side to increase its military efforts. But when one actor is weakened by the disaster and the other lacks the capability to exploit that weakness, conflict intensity declines.

State support to non-state armed groups outside a state’s own territory is commonly seen as a direct relationship between a state sponsor and a rebel group. But powerful states can use a third state—a dealer or broker—as a conduit for military and other support. States that fail to identify an alignment of interests with these intermediary dealers and brokers face strategic failure.

Why should Washington save Intel? The answer most frequently provided by policymakers is that the U.S. produces no advanced chips, putting it at risk of losing a conflict with China if Taiwan is unable to ship chips across the Pacific. In reality, this is a canard. Peter Wennink, CEO of Dutch lithography giant ASML, dispelled this myth in December, saying that “it is common knowledge that chip technology for purely military applications is usually 10, 15 years old.” America’s warfighting capability is not meaningfully undermined by its lack of production of advanced chips as even platforms like the F-35 fighter jet use only legacy chips.

High broadband access and adoption rates can significantly improve earnings and net worth. Yet, year after year, Black and Brown Americans are among the most disparately impacted by digital inequities, which only contribute to the structural economic disparities that have tormented them for centuries. This tribute to Black History Month explains why historic investments in digital infrastructure are insufficient without transformational broadband policies that support economic resilience in every household.

Joseph Nye argues that prudence results from the fear of creating unintended consequences in unpredictable systems and can develop into a norm of nonuse or limited use of certain weapons or a norm of limiting targets. Something like this happened with nuclear weapons when the superpowers came close to the brink of nuclear war in 1962, during the Cuban missile crisis. The Limited Test Ban Treaty followed a year later.