
Talking Strategy S6E3: Lord Mervyn King: Effective Strategy for Radical Uncertainty
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Oct 21, 2025 Lord Mervyn King, former Governor of the Bank of England and co-author of Radical Uncertainty, dives into the complexities of decision-making amidst radical uncertainty. He contrasts radical uncertainty with resolvable risks, emphasizing the importance of judgment over probabilities. King elaborates on how policy should be shaped by narratives rather than mere data. He also discusses the need for organizations to be resilient and adaptable, advocating for diverse perspectives to enhance strategic leadership while highlighting AI's supportive role in decision-making.
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When Probabilities Fail
- Radical uncertainty is when you cannot assign reliable probabilities to outcomes and must use judgment instead.
- Most strategic decisions fall into this category rather than resolvable uncertainty.
Demand Explanations Not Percentages
- Ask advisors to explain the reasons behind their estimates rather than demand a single probability.
- Build narratives from evidence and judgment instead of delegating decisions to arbitrary numbers.
Evidence Informs, Judgment Decides
- Evidence must inform narratives but cannot dictate policy alone.
- Science challenges and updates views; politicians must still exercise judgment.

