The clock is ticking on one of the world’s last nuclear “safety nets” — and the stakes couldn’t be higher.

In this sobering and deeply insightful discussion, Prof Tilman Ruff unpacks the New START Treaty and what its potential expiration means for global security, stability, and humanity itself.

We begin with the basics: what the New START Treaty actually is, explained in clear, accessible terms — and why it has served as the final major guardrail preventing unchecked nuclear expansion between the United States and Russia.

But what happens when that guardrail disappears?

Prof Ruff takes us into the immediate consequences of a post-treaty world — where inspections stop, transparency fades, and trust erodes. Without verification and data-sharing, uncertainty creeps in… and in the nuclear realm, uncertainty is dangerous fuel.

The conversation then turns to the looming risk of a renewed nuclear arms race. How quickly could both powers scale up their arsenals? Faster than most people think. And with that comes a chilling reality: global security becomes more fragile by the day.

We also explore one of the most under-discussed dangers — miscalculation. When communication breaks down and visibility disappears, the risk of misunderstanding or accidental escalation rises sharply. In a nuclear context, even a small error can have catastrophic consequences.

Adding another layer of complexity is the role of China. Is it realistic to expect Beijing to join arms control agreements at this stage? Or has this insistence stalled progress altogether?

Beyond geopolitics, Prof Ruff brings the focus back to people — the humanitarian and public health implications of renewed nuclear tension. The impact would not just be political or military; it would be environmental, medical, and deeply moral.

Finally, we look ahead. Even without a formal treaty, what practical steps can still be taken to reduce risk? And why is the call for global nuclear disarmament more urgent now than ever before?

This is not just a policy discussion — it’s a wake-up call.

Listen in.