[jkonowitch]

150 years ago the agricultural sector employed roughly 80% of American workers. Today, it employs less than 3%. It may be hard to imagine looking forward rather than back, but dynamic economies are capable of experiencing such dramatic shifts AND of absorbing and reallocating the labor towards more productive uses. They key thing to understand is that once certain modes of production become less efficient relative to alternatives, often because of technological advances, it frees our resources and productive energies to engage in new enterprises. It's true that employment dislocations that occur from rapid technological advancement can cause great transitional distress; that is why it's important as a society that we find humane and efficient ways of supporting people through these changes. However, the net result of progress is that we are all better off. No one can say exactly what the baristas or the project managers of today will become, no more than anyone could have predicted what would have become of the farmworkers who were displaced in the great migration towards a service economy. But, the last 150 years have seen a veritable explosion in the specialization and profusion of occupations which were previously economically unviable. I see no reason why we should not expect the same kind of evolution going forward.

[wvenable]

What happens when machines are stronger, have greater endurance, and are cheaper than humans? What happens when machines are smarter, faster, make less mistakes, and are cheaper than humans?

The "same kind of evolution" is no longer ours -- it belongs to the machines. How does your optimism work when most human effort is simply obsolete?