Never mind the decline in improvement, I think we're going to see a sudden sharp drop very soon. It may be hidden by the long-lived generation before, but the baby boomers have eaten, drunk, and medicated themselves into oblivion compared to their parents. And who knows what's to come for the next generation, with an increasing wealth divide and heck knows what else.
My parents, baby boomers themselves, are starting to see the effects of this. Funeral after funeral of friends and family dying in their early to late 60's - almost always due to heart disease, liver failure or some sort of cancer. Every time I join them it's the same "he seemed so healthy/ it was so unexpected/ she was gone so quickly". In my head I can't help but think "he ate nothing but meat/ she drank a bottle o…
In a "Death and Dying" psych class I took in university, the professor remarked how we went from dying from infectious diseases to dying from lifestyle issues.
I'm not sure how true or false this is, but when one isn't going to die from the flu you might live long enough to die from consuming too much bacon and alcohol.
I'm interested in learning more about this idea.