Antifragile revolves around the idea that people confuse risk of ruin with variations –a simplification that violates a deeper, more rigorous logic of things. It makes the case for risk loving, systematic “convex” tinkering, taking a lot of risks that don’t have tail risks but offer tail profits. Volatile things are not necessarily risky, and the reverse. Jumping from a bench would be good for you and your bones, while falling from the twenty-second floor will never be so. Small injuries will be beneficial, never larger ones. Fearmonging about some class of events is fearmonging; about others it is not. Risk and ruin are different tings.