I would add that Greer also seriously underestimates human genius in producing energy.

Oil is FAR from the only game in town. It has been the dominant game for a while, not because there are no other possibilities but because oil has been immensely profitable for the few family fortunes that made it their business to monopolize the petrochemical industries.

Just think about all the suppressed energy inventions, those that did not receive financing because oil was more profitable, those that were ended with force, sometimes with fatal consequences for the inventor. Once the floodgates open on energy alternatives, there will be literally thousands of ways to produce energy.

Once we apply human genius to developing alternatives without restrictions, we will look back at the era of oil with wonderment, bewildered how we could have stayed so long on one stage of development, an energy era that should have lasted decades instead of two centuries.