Since the end of the Second World War, humanity has lived with a paradox: extraordinary scientific, economic, and social progress coexisting with unprecedented destructive capacity. The devastation of 1939–45 produced a shared recognition that civilisation itself required guardrails—rules, institutions, and norms designed to prevent self-annihilation. The United Nations, arms-control regimes, international law, and multilateral diplomacy were born from that moment of reckoning.

In 2026, the world stands once again at a historic inflection point, arguably the most dangerous since 1945. The choice confronting humanity today is no longer between rival ideologies or competing power blocs, but between civilisational survival and self-destruction. What is at stake is not simply peace or war, but the continuity of human civilisation itself.

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In my earlier article, “The Fractured World Enters 2026,” I argued that the global system has moved from managed competition to unmanaged confrontation. That diagnosis remains valid. What has become clearer is that this confrontation now unfolds in a world stripped of restraint—where nuclear weapons are discussed casually, ecological collapse accelerates unchecked, identity is weaponised, and disruptive technologies outpace governance.

The post-war international order was imperfect, but it rested on a crucial premise: that certain actions were unacceptable because their consequences would be catastrophic. That premise is now eroding. Arms-control agreements have collapsed or been sidelined. International law is applied selectively. Multilateral institutions are weakened by great-power rivalry. Ethical language has been replaced by narratives of dominance, revenge, and civilisational entitlement.

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The gravest danger in 2026 is therefore not any single conflict, but the systemic erosion of restraint itself. Without restraint, every crisis becomes potentially existential.

Nuclear weapons were originally justified as instruments of deterrence—so destructive that their use would be irrational. That logic is now under unprecedented strain. The revival of tactical........

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