> My parents' generation, the boomers, weren't really aware that smoking was bad.
As a boomer, I say "baloney".
For starters, my dad grew up in the Depression. His schoolmates called them "coffin nails". Doctors routinely prescribed "stop smoking, you fool".
In 7th grade, one of my teachers (incidentally, a Holocaust survivor), smoked constantly. He'd also spend half of class time coughing up a lung. My best friend in high school smoked constantly, and told him his doctor told him his lungs were damaged and he better quit. He kept smoking.
But the worst was when I was 8, and toured an agricultural museum at K State. There were two jars with lungs in them, one from a non-smoker, and the other a smoker. The non-smoker lungs were pink and looked healthy. The smokers - black! All black! It was horrific.
Besides, anyone who cut open a dead body knew instantly if the deceased was a smoker. No sane person would conclude the black, scarred lung was healthy.
All the boomers knew the bad effects of smoking. They just thought they were invulnerable.
it also did not seem to impact lifespan for them
dying in your 60s was par for the course until second half of the 20th century.
lead petrol, cigs, war, asbestos, lead paint in children bedroom
In the first half of the 20th Century war was the leading cause of a great many men and some women dying in their 20s and 30s .. and to a lesser degree at later ages (if in occupied territories, etc).
Dying young drags "life expectancy" figures (especially those calculated "from birth") but doesn't necessarily impact the likelihood of dying (say) "within the next 5 years" if you're already (say) 55.
Eg. Many people that survived war in the early 20th Cent still managed to live to a ripe old age past their 60s.
The boomers quit smoking decades ago.
I grew up mostly in a rural town, unwittingly away from lead gasoline fumes.
Kids today may think they're smarter than boomers because they don't smoke. But instead they smoke marijuana. There's nothing smart about that.