I've always found the numbers in https://en.wikipedia.org/wiki/List_of_countries_by_life_expe... rather interesting, because of how different the cultures and living conditions are even among the top countries. Hong Kong and Japan are always around the top, but so are Switzerland and Australia.
Australia has
* food standards for shops and franchises .. McDonalds here has better salads that in the US,
* sport and activity as a fundemental part of most lives,
* good health care for all, even for "bottom tier" unemployed, with hybrid public/private health insurance and literal walk in, fall over, free heart surgery and follow up (for those that cannot pay).
Stats wise, higher life expectancy and better cancer survival rates*
* Yes, better, but not by much .. just cheaper and across the demographics.
We have a huge amount of data around physical size being inversely correlated with lifespan. The bigger you are, no matter what drives it - height, muscle mass, body fat, etc. - the lower your life expectancy is.
Obviously lots of other factors, but it does help explain part of why we see much of the most developed portions of Asia at the top of the list.
Switzerland is an interesting counterpoint, though - average height there is taller than most of Europe - though their obesity rates are about half of that of the European average.