International Security & Defense

The Cold War started earlier than we think — and maybe never ended at all. Historian Calder Walton says understanding the US-Soviet conflict prepares us for this era of tensions with Russia and China.

Juliette Kayyem writes that he didn't want to merely murder people; he wanted to do so with the attention of the world.

Foreign Affairs has recently published a number of articles on how the United States should engage with the Taliban government in Afghanistan, extremist forces within the regime, how the West can help ordinary Afghans, and the fate of the country’s women. To complement these essays, Foreign Affairs asked a broad pool of experts for their take. As with previous surveys, Foreign Affairs approached dozens of authorities with expertise relevant to the question at hand, along with leading generalists in the field. Participants were asked to state whether they agreed or disagreed with a proposition and to rate their confidence level in their opinion. Two Belfer Center experts participated, International Security Executive Editor Jacqueline L. Hazelton and Future of Diplomacy Project Senior Fellow Paula Dobriansky.

Former International Security Program Research Fellow Rebecca Weiner is profiled by the New York Times after becoming the New York Police Department's deputy commissioner of intelligence and counterterrorism. The former deputy commissioner of the bureau, John Miller, in 2014, said she had a "remarkable" ability to recognize how security threats were changing.

Calder Walton recounts how Russia and China are using their intelligence agencies to reverse the outcome of the Cold War

Gabrielle Armstrong-Scott and Jim Waldo argue that machine learning tools and a better definition of "terrorist and extremist content" could help make the Web a safer place.

Technology companies and governments have spent the past decade trying to better address the evolving threat of terrorist and violent extremist content online (TVEC). This paper examines how effective these efforts have been, where we are today in managing the problem, and wherein lie gaps for improvement.

The following is an event write-up about the recent Project on Europe and the Transatlantic Relationship (PETR) seminar on “France’s Global Role in a Changing World Order” co-moderated by Natalie Colbert, Executive Director of the Belfer Center, and Svenja Kirsch, Fellow with PETR, on April 19, 2023.

Calder Walton explains why, as the 20th anniversary of the U.S.-led invasion of Iraq passes, it is useful to understand how China's intelligence and national security establishment reacted at the time.

Juliette Kayyem argues why making extremist leaders answer for their actions will deter future violence.