BRITAIN’S FOREIGN SECRETARY SAYS AI IS THE GREATEST SECURITY THREAT OF THE NEXT DECADE — AND THE WORLD IS NOT EVEN CLOSE TO READY Britain’s Foreign Secretary Yvette Cooper stood up this week and said something that most governments have been careful to avoid saying out loud. Speaking ahead of the UN Global Dialogue on AI Governance in Geneva, Cooper called artificial intelligence the greatest security challenge of the next decade and warned that the international community is not organized well enough to deal with it. The statement is significant coming from a sitting foreign minister of a permanent UN Security Council member. The UK has been trying to carve out a role as a neutral convening ground for AI safety since the Bletchley Park summit in 2023, but Cooper’s language this week was notably sharper than anything coming out of those earlier diplomatic gatherings. The concern she and other officials keep returning to is the gap between how fast the technology is moving and how slowly governments are building the agreements and institutions needed to contain its worst potential uses. That gap is widening, not narrowing. The models released this month alone, including OpenAI’s GPT-5.6 with its built-in cybersecurity capabilities, illustrate the point. Tools that were theoretical threats two years ago are now commercially available at consumer prices. Cooper called for international cooperation but stopped short of proposing a specific framework. The countries with the most to gain from AI are not the same countries with the most to lose, and nobody in Geneva last week pretended that was not the central problem. Keywords: UK AI security threat, Yvette Cooper artificial intelligence, AI governance 2026, AI national security