Depression, diabetes and health issues that are affecting the first world is unique to the develop Nations
It's not an issue for less developed nations they have third world proplems
As for people I know for men they are most unhappy in their 20s and get happier in their thirties for women it's the reverse
Also when you get older you are no longer as interested in pursuing wealth, fame and success because in some ways
They are false Idols
Does what we think makes us happy comes from the internal locs of control or external locus of control