Do experts trust rationality of leaders of 9 nuke armed nations circa Sept 2026?

[Kevin Pacey]

Here's one Google AI answer to query:

why do experts trust that leaders of 9 nuclear powers will act rationally as of 16 september 2026

why do experts trust that leaders of 9 nuclear powers will act rationally as of 16 september 2026 - Google Search

"AI Overview

Nuclear policy and geopolitical experts do not broadly trust that the leaders of the nine nuclear powers will act rationally. In fact, leading global security institutions have explicitly warned that traditional assumptions of baseline rationality are no longer guaranteed. Recent assessments from organizations like the Stockholm International Peace Research Institute (SIPRI) highlight that escalating geopolitical tensions, the collapse of historic arms control frameworks, and the integration of dangerous new technologies make relying on "rational actors" a precarious gamble. [1, 2, 3]
The baseline "trust" that still exists in strategic deterrence is not based on faith in human nature, but rather on structural constraints:

Structural Pillars Supporting Nuclear Restraint

• The Math of Mutually Assured Destruction (MAD): The core foundation of nuclear deterrence remains the concept of a survivable second-strike capability. Leaders are constrained by the reality that initiating a nuclear strike guarantees their own nation's total annihilation—meaning the cost of victory is indistinguishable from defeat. [1, 2, 3]

• Institutional Guardrails: No single leader can deploy a nuclear weapon entirely on a whim. Deeply entrenched bureaucratic networks, verification codes, and military chains of command exist within each of the nine nuclear powers to prevent rogue or unhinged actions. [1]

• The Power of the Nuclear Taboo: Over 80 years of non-use have fostered a powerful global norm. Leaders are acutely aware that shattering the nuclear taboo would turn their nation into an absolute international pariah, severing all economic and diplomatic survival lines. [1]

Why Experts Warn "Rationality" Is Erasing
Despite these structural pillars, modern experts from bodies like the Chatham House and the United Nations are actively sounding the alarm that rationality cannot be assumed for several critical reasons: [1, 2]

• Artificial Intelligence Decision-Making: The rapid integration of AI into military targeting and early warning systems significantly accelerates the pace of war. This dramatically narrows the decision-making window for human leaders, increasing the severe risk of automated escalation or miscalculation. [1]

• The Decay of Arms Control Treaties: The definitive expiration of the New START Treaty between the U.S. and Russia has dismantled critical verification frameworks. Without on-site inspections, a dangerous deficit of trust fuels paranoid, worst-case-scenario thinking. [1, 2, 3]

• Psychological & Behavioral Biases: Modern behavioral decision research emphasizes that under severe stress, human leaders rely on cognitive shortcuts, suffer from groupthink, and exhibit overconfidence. A leader under existential pressure may perceive a highly irrational move as their only logical choice for survival. [1, 2, 3, 4]

Would you like to take a closer look at the specific command-and-control systems of one of these nations, or examine how AI integration is shifting modern nuclear doctrines?"