"[W]e have crossed a great divide, between what we used to do in all of previous human history and what we do now. Utopia, it is true, this is not. I imagine Bellamy would be at once impressed and disappointed. The economic historian helps explain why. ...With our increasing wealth, what used to be necessities become matters of little concern ...conveniences turn into necessities. Luxuries turn into conveniences. And we humans envision and then create new luxuries. ...He saw humanity on a hedonic treadmill: "...the triumph of economic growth is not a triumph of humanity over material wants; rather, it is a triumph of material wants over humanity." ...[T]his hedonic treadmill is one powerful reason why, even when all went very well, we only slouched rather than galloped toward utopia."