Do you believe that, on balance, the world is no better today than in 1892? If so, that's where we disagree.
I think that the floor has been raised and the ceiling has been lowered for the typical person. There's far less suffering, but absence of suffering is not the same as happiness. In that respect I think a random 1892 person may have actually been happier. South Korea has 30x more suicides than Syria.
Citation definitely needed.
The ones I know find happiness in their relatively high pay for an 8hr/day, no GED-required job, with the job security that the first few days are blindingly difficult for anyone to adapt to, even highly fit college athletes (source: 40+ garbageman whose son couldn't hack two days of it).