The Premonition: A Pandemic Story

by Michael Lewis

people have a very hard time getting their minds around pandemics. Why was it still possible, in 2006, to say something original and important about the events of 1918? Why had it taken nearly a century to see a simple truth about the single most deadly pandemic in human history? Only after three amateur historians studied the various interventions, and the various death tolls in individual American cities, did the importance of timing become obvious. Carter wondered why this had been so hard to see. A big part of the answer, he decided, was in the nature of pandemics. They were exponential processes. If you took a penny and doubled it every day for thirty days, you’d have more than five million dollars: people couldn’t imagine disease spread any better than they could imagine a penny growing like that. “I think it’s because of the way our brains are wired,” said Carter. “Take a piece of paper and fold it in half, then fold it in half again, for a total of 50 times folding it in half. If a piece of paper is 0.004 inches thick to begin with, by the time you fold it 50 times, it is more than 70 million miles thick.” Again, it feels impossible. The same mental glitch that leads people to not realize the power of compound interest blinds them to the importance of intervening before a pathogen explodes.

The Mental Glitch: Why Humans Struggle to Grasp Exponential Threats