@Mitch okay well it makes a lot of sense for acute, lethal diseases or wars. For most people that don't smoke or drink too much, it's chronic coagulation disorders or obesity-related problems that lower life expectancy, and they are treated with almost always low- or moderate-cost therapies over a span of decades (only hospitalizations would cost a lot). But smoking often causes chronic conditions as well: Increases the incidence rate of several cancers, increases organ damage, increases