Sure it does. Ready access to energy is what makes our lives better than an iron age farming village. It enables us to become wealthy, get fat, produce large structures. This energy is fossile fuels. The production of energy is tied to wealth as it enables more resources to be produced. He has some other posts that show why we will eventually have a finite supply of energy on Earth even with fusion, geothermal and solar. At some point, we wont have enough energy to meet the demand. With such a large population dependent on this energy, the results will be catastrophic. I suspect the population will stabilize eventually, but he does a good job tying energy production into the economic system and essentially showing why we either must become self sufficient in small family groups and watch our population, or head to the stars (which he also thinks is highly unlikely).