This is s thought provoking paper featuring a theoretical model that pre-sages a breakage in industrialization. Like all such models, this should be looked at as theoretical. Theory is simply a good educated guess until tested. This theory will take a while to test empirically, because the period is so long. After all, we are still unsure of the Kondratieff long wave economic theory that is only 55 to 60 years long because the theory's period is longer than a generation (http://en.wikipedia.org/wiki/Kondratiev_wave). The article hits all the political hot buttons of our age: environmental sustainability, income in/equality, and population. Is this model really a theory, or a sales job for a particular political agenda?