Interestingly, the very people the "social justice warriors" claim to fight for reaped the most benefits of the social and economic progress. Well-deserved, of course, since they started way behind. But it makes you wonder, why the SJWs are as unhappy about the state of our society as they ever were? A cynic would say, they are afraid of losing their metaphorical jobs. I'd rather believe that they just lack the insight into just how much worse the life was not so long ago.
I've heard from friends with mental health problems that one of the hardest things to deal with can be other people telling them that objectively their life is good ("you have family, friends, success in work - what have you got to be unhappy about?")... so on top of feeling depressed they're also emoting wrongly.
Surely if a person feels that the sky is falling that would be a measure of low well-being. In which case the 'objective measures of human well-being' are badly chosen or (more realistically, and something that will cause massive cognitive dissonance in lots of readers here): not everything can be measured objectively. Experience happens subjectively, behind the eyes, and can never be usefully measured. Which is why when someone tells you they're unhappy you have to decide whether to believe them, or just tell them that they're wrong.
Personally I think trying to objectively measure how good life is now compared to other times is embarrassingly futile. Your internal philosophy makes a huge difference to how you handle life, it's perfectly possible for a person to have a non-miserable life in a society with high infant mortality rates and a life expectancy of 40, with hostile tribes nearby who might need to be fought at any time. Expectations (norms) along with cultural and psychological frameworks would make the experience for someone native to that time and place very different than it would be for somebody who was dropped from the modern Western world into a similar situation. Of course the same example native person might also live unhappily. But to presume that their subjective life experience should be ruled by abstract measurements is... unimaginative.
I can never find any reference to it online but years ago I remember Gordon Brown (UK PM at the time I think) talking on TV about quality of life, saying "one thing we've found is that people report being happier when they hear birds singing... so we're looking into using recordings of birdsong to increase happiness levels". LOL it's like, dude... you're really not getting it are you?
Pinker's book was a little bit bizarre: upset that people had not been persuaded by the deluge of graphs in Better Angels of Our Nature, he decides to provide us with yet more graphs.
What the analysis seems to miss is that life does not happen in the aggregate. While the story around the world has been one of improving health, wealth and prosperity, there are individuals around the world who have not felt the benefit.
Pinker and Rosling's solution seems to be to call these people ungrateful, whining, or "social justice warriors".