Looking Past Health System to Explain Longevity Gap in U.S.

Americans are more ethnically diverse. They eat different food. They are fatter. Perhaps most important, they used to be exceptionally heavy smokers. For four decades, until the mid-1980s, per-capita cigarette consumption was higher in the United States (particularly among women) than anywhere else in the developed world. Dr. Preston and other researchers have calculated that if deaths due to smoking were excluded, the United States would rise to the top half of the longevity rankings for developed countries.

I had not thought about that before.  Smoking!