It is tempting to conclude that international law’s influence is receding in a context where power struggles are in the ascendant, especially between dominant nations. But the law still carries weight: as the ultimate constraint on the use of violence, as a shared language for all human communities, and as a framework for action for those who seek to invoke it. It doubtless needs to be rethought and adapted to changes in international relationships, but without losing sight of its day-to-day importance.

The arms control system built during and after the Cold War is under enormous stress and is fraying at the edges. It once enabled significant improvements in international security but is in danger of not withstanding the resurgence of tensions in recent years. Urgent action is now needed to prevent the proliferation of nuclear, chemical, and biological weapons, as well as cluster bombs and anti-personnel mines.

Historically, technological change has altered how battles are fought but has not overturned the fundamental principles of war. However, three considerations may now represent an actual revolution: the recourse to tactical nuclear weapons, the development of software for “multi-domain operations,” and the prospect of general artificial intelligence. The organization of militaries and the use of force need to be rethought in this light.

Historically, technological change has altered how battles are fought but has not overturned the fundamental principles of war. However, three considerations may now represent an actual revolution: the recourse to tactical nuclear weapons, the development of software for “multi-domain operations,” and the prospect of general artificial intelligence. The organization of militaries and the use of force need to be rethought in this light.

Vikas Swarup, an Indian writer and former diplomat, is the author of four novels, including Q & A (New York: Doubleday, 2005), which has been translated into 47 languages and adapted for the screen under the title Slumdog Millionaire.

Text published in Politique étrangère, Vol. 91, No. 2, 2026.

The system that emerged after the Second World War to regulate international relations is now moribund. Russia and China may have weakened it, but it seems that Donald Trump’s United States may deliver the fatal blow. The prevailing atmosphere is one of power struggles, and the rise of nationalisms is fraught with danger. The artificial intelligence revolution also needs to be factored into this equation, as it has a strong bearing on how much power different players can exert. In this respect, Europe must ensure it does not get left behind.

The construction of the European Union is historically inseparable from the emergence, at the end of World War II, of an Atlantic world dominated by the United States. Successive enlargements and the revision of U.S. policy are undermining the concepts upon which the European Union has been built since the fall of the USSR. It is undoubtedly time to return to a path of more diverse groupings, corresponding to the levels of commitment and the interests of the states of the Old Continent.

Few countries have been as profoundly affected by the attacks of October 7th and the subsequent Gaza war as Germany. This is not merely a political controversy. It reflects a deeper structural problem: German-Israel policy has long rested on two guiding principles—a particular historical responsibility toward Israel derived from the Holocaust, and a firm commitment to universalist norms, above all international law and human rights.