Rumsfeld's Rule

You're seeing Rumsfeld's Rule when a company's risk assessment covers only identified risks but doesn't account for structural blind spots — the things they haven't even thought to worry about.

You're seeing Rumsfeld's Rule when a failure's root cause turns out to be something nobody on the team had considered a risk category at all — not a misjudged probability but an entirely missed variable.

Your risk register is a list of known unknowns. The real threat is what's not on the list. Build resilience — cash reserves, optionality, diversified dependencies — that protects you against risks you haven't imagined, not just the ones you have.

Bezos built Amazon's decision-making culture around the awareness that unknown unknowns dominate outcomes at scale. His insistence on "Day 1" thinking, two-pizza teams, and written narratives over slide decks all serve the same purpose: surfacing assumptions that would otherwise remain invisible. Bezos explicitly designs for what he can't predict — AWS was built with excess capacity that seemed wasteful until it became Amazon's most profitable business, a classic unknown unknown turned into advantage. Founders can apply this by building organisations that are structurally resilient rather than just strategically prepared. The goal isn't predicting every risk; it's surviving the ones you can't predict.