Diplomacy

Just Security’s expert authors offer analysis of diplomacy and its role in addressing global challenges, from armed conflicts to international crises and more. Our coverage includes U.S. foreign policy, international organizations, and multilateral diplomacy related to critical global issues.

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(L-R) A general view of the capital Nuuk, Greenland, on March 4, 2025. US President Donald Trump has strained relations with Denmark by repeatedly signalling that he wants control over Greenland, an autonomous Danish territory. (Photo by ODD ANDERSEN/AFP via Getty Images); U.S. Secretary of State Marco Rubio listens as U.S. President Donald Trump addresses the media during a news conference at his Mar-a-Lago club on January 3, 2026, in Palm Beach, Florida. During the remarks, Trump confirmed that the U.S. military had carried out a large-scale strike in Caracas overnight, resulting in the capture of Venezuelan leader Nicolas Maduro and his wife, Cilia Flores.(Photo by Joe Raedle/Getty Images); A general view of the capital Nuuk, Greenland, on March 4, 2025. US President Donald Trump has strained relations with Denmark by repeatedly signalling that he wants control over Greenland, an autonomous Danish territory. (Photo by ODD ANDERSEN/AFP via Getty Images)

Collection: U.S., Greenland, and NATO

Experts examine legal, political, and security dimensions of U.S. policy on Greenland, including U.S.-NATO relations, congressional oversight, and geopolitical implications.  
Ukraine's President Volodymyr Zelensky and European council secretary general Alain Berset (R) speak after the signing of an agreement for establishing a special tribunal to try top officials responsible for Russia's invasion of Ukraine at the Council of Europe in Strasbourg, eastern France, on June 25, 2025. (Photo by FREDERICK FLORIN/AFP via Getty Images)

In Absentia Trials and the Special Tribunal for the Crime of Aggression Against Ukraine

When defendants can be informed of their trial and have a right to a retrial in person, in absentia trials can be legitimate and necessary for victims and society at large.
Malaysian police officers in riot gear — helmets, face shields, and red "POLIS"-marked shields — stand in formation on a street, viewed from a low angle with an officer's boots in the foreground.

Three Lessons from the Intersection of Sanctions and Corruption

Without prioritization of enablers, definitions, and political will, sanctions will continue to police the margins of corruption while leaving its center untouched.
A woman speaks at a podium during a Perry World House event, with audience members seated in the foreground and a Perry World House banner and University of Pennsylvania screen behind her.

Introducing a New Symposium: The Intersection of Sanctions and Corruption

Just Security and Perry World House bring together experts to examine sanctions and anti-corruption policy as tools to target corruption and shape global accountability.
The facade of the ICC building.

Transnational Repression and the Case for International Criminal Accountability

International criminal law should be applied to transnational repression. The tools to do so may already exist.
The flag of Mexico flying at United Nations headquarters in new York (via UN Photo)

How Multilateral Powers Can Still Save the World Order

Imperfect as the postwar order may be, the cost of abandoning it would be far greater than the cost of reinforcing it.
The outside columns and relief of the US Treasury Department building in Washington, DC, on July 22, 2019.

Dubious Delistings: Unexplained U.S. Sanctions Removals for the Corrupt and Well-Connected

U.S. targeted sanctions have long promoted accountability, but recent removals under Trump raise concerns about opacity, favoritism, and weakening human rights enforcement.
The three officials sit next to each other at desks behind a solid, dark wood panel , with the flags of the EU, Hungary and Budapest arrayed behind them, and members of the press facing them in the foreground, some of them wearing headsets and one holding a mobile phone at the end of a selfie stick, recording the briefing.

What American Mayors Can Learn From Budapest

Amid democratic backsliding, Hungary's mayors helped maintain people's trust in government, demonstrating how local leaders can help reweave torn social fabric.

The Just Security Podcast: Murder on the High Seas Part V

Tess Bridgeman and Rachel Goldbrenner are joined by Rebecca Ingber and Brian Finucane to examine escalating U.S. strikes on suspected drug traffickers.
People walk underneath an advertising billboard of Syria's largest mobile operator Syriatel, owned by businessman Rami Makhlouf, in the Syrian capital Damascus on May 11, 2020. (Photo by STR/AFP via Getty Images)

Taking a Closer Look at Syria’s Economy: Accountability or Business as Usual for Assad’s Cronies?

Syria’s economic future must be reshaped, including through accountability for corporations and businesspeople, and an economic system guided by the rule of law.
In this picture obtained from Iran's ISNA news agency on May 4, 2026, the Iran-flagged tugboat Basim sails near a ship anchored in the Strait of Hormuz off Bandar Abbas in southern Iran. Iran's Revolutionary Guards on May 4 denied that any commercial ships had crossed the Strait of Hormuz, after the US military earlier said two US-flagged merchant vessels had transited through the vital waterway. (Photo by Amirhossein KHORGOOEI / ISNA / AFP via Getty Images) /

What the Iran War Reveals About the War Powers Resolution and How Congress Can Act

It is Congress’s responsibility to assert its constitutional prerogatives with respect to the use of force and to rein in a lawless executive.
Magyar, standing on the left in front of a red, white, and green Hungarian flag, shakes hands with von der Leyen, who is standing on the right in front of the EU flag, with a blue backdrop in between the flags carrying the emblem of the European Commission.

Hungary’s Election Is Already Paying Dividends for the EU and Ukraine. Is the U.S. Next?

Peter Magyar's election defeat of Viktor Orban in Hungary is easing relations with the EU and Ukraine. The course correction could even reverberate in the U.S.
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