About long life expectancy, assuming genetics is the same:
1) Healthy diet (quality protein with low saturated fat, low sugar, low sodium diet)
2) Good amount of exercise (doesn't means marathon, just moving around instead of sit indoor all day)
3) Reduce stress
4) Family support
5) Good healthcare
6) Closer to nature, outdoor, etc.
7) Eliminate carcinogens (cigarette, hard liquor, substance abuse, BBQ meat, preservatives, etc)
A lot of the above come from high incomes and a lot of the above disappear along with urbanization.