I do not agree, however, with Chris premise that we are anywhere near a limit to population growth.
The key parameter is total global population rather than the growth rate. I agree that we may be nowhere near the total human population that could reside on Earth.
"...as we expand our technological repertoire through scientific discovery and technological and intellectual development, we can define an increasing area of the natural world as natural resources and we can use these resources more and more effectively. Consequently we will end up being able to support and host much more human beings on this planet than, what we think is possible at today's technological and intellectual capacities...
Since 99%+ of all available energy ultimately comes from the Sun I did a back of the envelope calculation using the Sun as the sole energy source. If you accept that technological advances in genetic engineering will allow humans to become green and photosynthesize then I found that in 800 years with population doubling every 50 years we will have a total global population of around 400 trillion and will be such a dense biomass on the planet that people will starve on cloudy days. Note I did not account for whether he planet has sufficient phosphorus for this population size
The bottom line however, is that there is a limit to population size.




As a subscriber, I am very happy with Chris' analyses on the economy and how to prepare for the coming financial disaster.
I do not agree, however, with Chris premise that we are anywhere near a limit to population growth.
Chris recently even quoted Jeremy Grantham (in this report - link), who believes the world can only support 1.5 billion humans. I think such views do not only have no scientific foundation, they are even outright dangerous, as they could give implicit support to ludicrous top-down population control policies such as the one-child-policy in China (or worse policies in the future).
Our 'fine leaders' clearly suffer from delusions of grandeur. They try to regulate and steer markets, invade into every possible area of our lives (from what we learn in schools, what we eat, what health care we receive etc.). Trust me, we don't want them to also start actively manage population growth.
I have expressed my serious concerns with this premise already below a recent report (link to report - subscription required). Quoting some of my main points:
"...as we expand our technological repertoire through scientific discovery and technological and intellectual development, we can define an increasing area of the natural world as natural resources and we can use these resources more and more effectively. Consequently we will end up being able to support and host much more human beings on this planet than, what we think is possible at today's technological and intellectual capacities...
When you look down on the earth from an airplane, you will see that the vast majority of this planet is not inhibited by the human race (even in countries that we think to be crammed, such as India). In fact the human race inhibits only a tiny, tiny fraction of the earth (above sea-level, of course)...
I would make the point that technological advancement isn't even necessary to solve the food problem. The German doctor Johann Schnitzer (in 'Gesundheit Getreide Welternährung', 2010) and quite a few others folks make very compelling cases that much of the food problem can be solved, if people were to move away from meat-centred diet to grain-centred diet. As a nice little side-effect this would also take care of much of our health problems...
Yes the economy will crash and many people will likely be wiped out, but it will not be a nuclear waste land afterwards. Yes, we will have quite a few tough years, but live will go on. Those people that still steer things top-down today politically will be rendered irrelevant in a few years, because humanity will have learned its lessons from the collapse. Yes, the lessons will be harsh, extremely harsh even to many - but that is what happens when people stop paying attention to the important things for many decades. The learning-effect, however, will be even greater due to the severity, meaning the bounce-back will be enormous (but that might be a decade or more away)...
The essential human pattern in the past ... has been to realise progress and realise progress we have done. The rate of progress has even been accelerating, which leads me to the conclusion that humanity has barely even started yet and that there is plenty of potential to host many, many tens of billions of more people on this planet."
Adam than pointed out that I might want to read the chapter "Why Technology Can't Fix This" in Chris Martenson's "The Crash Course". After having done so, my doubts with regards to Chris' neo-malthusian stance has even increased - here is an overview of some of my main criticisms:
- Chris points out that technology does not create energy (p 177). There is no doubt about that, but with the help of technology we are able to extract energy from types of natural resources that we haven't envisioned before (and hence not regarded as being part of our natural resources and hence were not included into neo-malthusian-calculations of how many people can live on this planet). We figured out to extract energy from wood, coal, oil, gas, nuclear, solar etc. There is little doubt that going forward (however, most likely not in time to avoid the coming collapse of the fiat monetary system) we will figure out, how to better extract energy from existing and from totally new sources.
- Chris also writes on pages 180 and 183 that energy we are given is a "one-time free gift", like a "gigantic pile of food that can only be eaten once". I couldn't disagree more. The energy might not even be limited by what we understand as our sources of energy today. It is still not clear, for example, how oil comes into existence - it sure doesn't come from dead dinosaurs, as we were being told in school. But even if the amount of oil was limited, then there is still no doubt that in the future humanity will be able to tap into more and more sources of self-renewing energy.
- Chris also writes on page 180 that "not once has anything that has been dropped on Earth ever floated upward instead of accelerating downward. Despite our technological prowess, not once have we ever found a way to defeat gravity here on the surface of the earth with our technology." There is not just gravitational forces on this planet, there are also many diverse levitational forces. Otherwise water would not be going up into the sky (and come back as rain again), or an apple, for example, would never find its way up a tree.
Just like Malthus was proven wrong with his theories about population limits from 200 years ago (I believe he once said or wrote that there is no way the earth can support more than 2 billion people - I can't find correct citation for this right now, however), Chris will be proven wrong when he implies that we are nearing the absolute population-limit that the earth can support.