What factors? Why are they unlikely to come about again? How do we make them come about again?
You realize that your comment reads like "well, actually things shouldn't be getting better over time"
I, for one, completely disagree.
You realize that your comment reads like "well, actually things shouldn't be getting better over time"
I, for one, completely disagree.
Less than half a million Americans died in WW2. For American demographics, the war was a footnote, unlike the utter devastation it inflicted on Germany, Poland, Yugoslavia, the USSR.
We now have renewable energy sources for both of these things spinning up faster than ever. It won't be all that long before we can generate a majority of our energy with clean power that doesn't require consuming any non-renewable resources.
No; much more important differences between then and now are the top marginal tax rates and the labor power.