Pre-Mortem Decision System
Think ahead to prevent disasters because stressed brains cannot think clearly
Daniel Levitin, a neuroscientist, presents a systematic approach to decision-making that accounts for the biological reality that stress destroys rational thinking. When the brain releases cortisol under stress, it clouds thinking, raises heart rate, and modulates adrenaline — yet you cannot tell your thinking is clouded because your thinking is clouded. Drawing on Danny Kahneman's concept of prospective hindsight (the pre-mortem), Levitin argues that we must anticipate failures and put systems in place before stress hits. Unlike a postmortem that analyzes what went wrong after a disaster, the pre-mortem looks ahead to identify everything that could go wrong and establishes preventive systems. This applies to everyday logistics like designating spots for easily-lost items using the hippocampus's spatial memory, to high-stakes medical decisions where you should ask about the Number Needed to Treat before agreeing to medication or surgery.
- Under stress the brain releases cortisol which clouds thinking, but you cannot tell your thinking is clouded because your thinking is clouded
- A pre-mortem anticipates failures before they happen rather than analyzing them after disaster
- Systems beat willpower because willpower degrades under stress while systems persist
- The hippocampus evolved for spatial memory of fixed locations — use it by giving important items permanent homes
- Identify Failure Points in AdvanceBefore a stressful situation occurs, systematically think through everything that could go wrong. This is the pre-mortem: rather than waiting for disaster and analyzing it afterward, you project forward and imagine the ways your plan could fail while your prefrontal cortex is functioning at full capacity.
- Design Systems for Routine FailuresFor everyday problems like losing keys, passports, and glasses, designate specific permanent locations and be scrupulous about always using them. The hippocampus evolved to track locations of important things but works best for items that do not move around. A hook by the door for keys eliminates decision-making under stress.
- Create Information BackupsTake cell phone photos of credit cards, driver's licenses, and passports and email them to yourself so they are in the cloud. If these items are lost or stolen, having digital copies facilitates rapid replacement without requiring you to remember account numbers or details while stressed and cortisol-impaired.
- Prepare Critical Questions Before High-Stakes DecisionsFor medical decisions, prepare to ask about the Number Needed to Treat — how many people must take a drug or undergo a procedure before one person benefits. For the most prescribed statin, 300 people must take it for one to benefit, while 15 experience side effects. Having these questions prepared prevents manufacturing reasoning under duress.
- Discuss Quality of Life Trade-offs While CalmHave conversations about major life trade-offs with family and loved ones before you are in crisis. Questions like whether you prefer a shorter pain-free life or a longer life with significant end-of-life pain should be explored when rational thought is available, not in a hospital flooded with cortisol and fear.
After breaking a window to get in, the stress and cortisol caused Levitin to forget his passport the next morning, nearly missing his flight. After returning, he installed a combination lock with a spare key near the door — a pre-mortem system preventing the same failure from recurring.
By asking for the Number Needed to Treat before the appointment, the patient discovers 300 people must take the drug for one to benefit while 15 out of 300 experience debilitating side effects, making them 15 times more likely to be harmed than helped.
Daniel Levitin developed this framework after locking himself out of his house at midnight in minus-40-degree Montreal weather. He broke through a basement window but the stress caused him to forget his passport the next morning, nearly missing his flight to Europe. A dinner conversation with Nobel laureate Danny Kahneman introduced him to prospective hindsight — the pre-mortem — which became the foundation for a systematic approach to anticipating failures before stress impairs cognitive function.