Of course I don’t believe in absolute free will so that may have something to do with my outlook...
The concept of "mental health" in our society is defined largely by the extent to which an individual behaves in accord with the needs of the system and does so without showing signs of stress.
We needn't halt it -- after all, if we can create a good desirable society, a billion more societies would be welcome.
But we have, and should continue to, what's truly valuable and worthwhile to pursue. An universe filled with automatons (even if scientific or mathematics god-like savants) is boring -- and I love mathematics -- but in general problem-solving ability is certainly not the whole story of cognitive experience, even general problem-solving ability. The life experience of Lee Sedol is more interesting than the synthetic "experience" of AlphaGo, even if it is superior at his life's work. If we had an AGI strictly geared towards solving technological problems the same might be said, even if ultimately other aspects of human experience are "wasteful", unnecessary for conquest and dominion.
FTFY
When I buy stuff because I feel empty inside, sure. When I buy tools to pursue a certain goal, things look a bit different.
After 6 months they had the same level of happiness.
Humans are great at growing accustom to their circumstances and then wanting more. It would help for a little while, but then everyone goes back to how they were before.
Getting the bumble bees back to a state of working in the same direction so we can be competitive with countries who've already achieved that is the tricky part.
The Enlightenment/democracy, abolition of slavery, civil rights movements, unions/labor rights movements are all examples of humans consciously improving their societies.
Great list though, maybe add on reproductive justice and climate science.
You can't change the world by treating everyone well but you can sure as shit make all their days better, and that's what we should be doing. If you want to live in a world that isn't isolating, stop isolating the strangers around you.
That said I think there's an element of truth that society generally creates incentives that can lead to outcomes nobody wants [1]. You can get equilibriums where without effective coordination people are trapped, sometimes the trapped state can prevent effective coordination itself.
It's not an easy problem to fix.
[1] http://slatestarcodex.com/2014/07/30/meditations-on-moloch/
When people chose to smoke pot, knowing that it was illegal, they were normalizing it. Those were small decisions by individuals that snowballed into legalization. Gay marriage and the acceptance of homosexuality followed the same pattern, where individuals decided to be more accepting, and that snowballed into societal acceptance.
Society is made up of individuals, and we are part of society. Throwing up our hands and abdicating responsibility doesn't serve anyone.