Thus you can have all this number crunching alongside a complete failure to talk about the role of medicine, the role of technological progress as a whole. This is a blindness to the essential nature of our time, which is rampant, accelerating progress towards the generation of more resources as they are needed.
You can't just throw up a thesis that population scales by energy (since, hey, population growth has a much better correlation with medicine and computing power and bandwidth) and then put a question mark on the chart of what happens after oil. We have perfectly good substitutes for oil now, and they are being made ever cheaper and more effective by vast numbers of people in response to past years of high oil prices. Which are on the way out for now because other groups of people have been uncovering vast new exploitable reserves of oil, and much cheaper and better ways to extract it and use it.
Meanwhile other people are working on getting to orbit, so as to provide infinite room, and really anyone who argues that somehow we're going to somehow run out of either energy or space any time soon just isn't thinking clearly about how the world really works.
People respond to future expectations of price. Nothing is static. The world will be upheaved and changed by as many people as it takes to replace a high price resource with a low price one. That will keep on happening and Malthusians of the death cult environmentalist variety like the author of this piece (let's kill some people, who goes first) will keep on looking confused as they try to explain their contrary viewpoint while ignoring the reality of what is going on day by day around them.
These people are evergreen of course. Here's an interesting reference from a time when there were on a couple hundred million people in the world:
http://www.spiked-online.com/newsite/article/7723
"In the year 200 AD, there were approximately 180million human beings on the planet Earth. And at that time a Christian philosopher called Tertullian argued: ‘We are burdensome to the world, the resources are scarcely adequate for us… already nature does not sustain us.’"
And what has changed between then and now, and what will change between today and tomorrow? Think on that.