Living with Fat Tails

In a fat-tailed world, the average is misleading. The average net worth in a room changes radically if Jeff Bezos walks in. The average city flood height tells you little about the monster flood that comes once a century and causes most of the total damage.

Wise decision-making in Extremistan means preparing for outliers rather than optimizing for averages. Keep reserves. Diversify. Build robust systems. The math says that in fat-tailed domains, the next extreme event matters more than the last thousand ordinary ones.