Britain’s Foreign Secretary Yvette Cooper just compared artificial intelligence to the atomic bomb dropped on Hiroshima. Not as a metaphor for innovation, but as a warning about catastrophic consequences the world hasn’t yet experienced but absolutely could.

In an essay published by the Chatham House think tank on July 5, Cooper argued that AI will become the single most important foreign policy issue over the next two years. Her message was blunt: the world needs binding international guardrails before it gets a live demonstration of what unchecked AI can actually do.

The strongest UK call yet for AI regulation

Cooper’s warning represents the most forceful statement from a senior UK official on AI risks to date. She framed the threat alongside climate change, irregular migration, and foreign interference as existential challenges to Western liberal democracy.

The UK has been positioning itself as a global leader on AI safety since the Bletchley Park AI Safety Summit in 2023, which brought together governments, tech executives, and researchers to discuss the technology’s trajectory. Cooper’s essay builds on that foundation while subtly acknowledging a new geopolitical reality: diminished US influence on the world stage.