In a NYT article Fred Thompson, talking about the economy, said that what is now a worrisome unemployment level used to be considered "full" employment. He also said that nothing is sustainable forever. Does that include profit growth that is larger than population growth? As some revel in the Dow's advance, they must not be doing ALL the math. If profit growth, real profit, is larger than population growth the only place this growth can come from is increased productivity per worker. We are seeing the use of the exploitation of resources and people to produce wealth for some but we have reached the end of that line in many ways.
As anyone that remembers high school math will tell you "A geometric progression will eventually reach tangent" Unfortunately for those of us living today this is a fact that those that came before us ignored. The economic progression must be in stasis with population if we are to survive as a civilization and a species.