As for working conditions, in terms of safety, cleanliness, physical hardship, etc., typical working conditions in developed countries are clearly much better than fifty years ago.
For many people's psychological welfare, I think these may be lesser concerns than mobility, autonomy, and freedom from monotony.
I don't think that typical jobs from 50 years ago were better in any of these regards. On the contrary, the well-paid blue collar manufacturing jobs that are associated with bygone better times in folk memory were quite bad by these measures. Just imagine working on an assembly line.
Focusing specifically on North America, where these trends appear to be the most pronounced, the key issue, in my opinion, is the distribution of status. Fifty years ago, it was possible for a person of average or even below-average abilities to have a job, lifestyle, and soci...
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: