That is because we nowadays produce so much more, thanks to the genius of technology and science.
How much less assured, by contrast, is the progress of the social and economic sciences over the decades.
Except, of course, much of the progress in economics over these decades has been in, well, you know, what are the circumstances which produce technological growth and scientific advance?
Like, Yaaay! for markets and Yah Boo Sucks! to planning, just as one example?