You did not understand what Rosling and I said, and Rosling did not give you the full picture!
He argued that population will rise to 9 billion (actually, it’s between 9 and 11 billion) by 2050, and it won’t go higher because the developing world is joining the Western world, leading to smaller family sizes, and thus a peak in population.
I made the SAME assertion. The problem is that even with the world population as of 2016 our biocapacity is down to 1.64 global hectares per person. By 2050, with world population at 9 to 11 billion, that biocapacity will be even LOWER.
To make matters worse, ecological footprint as of 2016 is at 2.75 global hectares, which is HIGHER than biocapacity. In short, we are using resources in an unsustainable way even with the CURRENT population.
And because we are doing that in a global capitalist economy involving competition, then that footprint has to keep going UP. And Rosling did not even realize that! The irony is that in order for most of the world to join industrialized nations and have fewer children, then they will need need to use more resources (e.g., from slippers to bicycles to cars to airplanes), which is what takes place in capitalism anyway, which means the ecological footprint per capita worldwide will continue to go UP.
In short, Rosling doesn’t contradict my argument but SUPPORTS it. The problem is that he did not mention the implications of continuous growth to you, and I did. To recap,
The current biocapacity per capita is already small for the current population, and the ave. ecological footprint per capita is already in excess of that. Rosling doesn’t mention that.
The main driver of that footprint is a global economy, and it has to keep growing in order to decrease poverty, but that also means increasing the per capita footprint. Rosling thinks that “green” tech, etc., should lead to lower resource consumption, but that’s questionable given the fact it’s already high right now, and any transition will require a buffer. On top of that, deploying better tech will take place in a global capitalist economy that requires maximization of profits!
Meanwhile, as Rosling admitted and as I explained, the population will continue to rise even as more people become prosperous because of momentum (because of large numbers of people even as birth rates go down). That means the biocapacity will drop. And because of that prosperity, the ecological footprint will also have to keep going up.
Finally, here’s what makes matters even worse: following the point of this discussion thread, both climate change and ecological damage (i.e., the world on fire and drought, among others), then more resources will be damaged, which means biocapacity will drop even more besides a drop caused by increasing population.
And to add to that, the same global economy is backed by incessant financial speculation which means increasing levels of credit (now with a notional value of over a quadrillion dollars thanks to unregulated derivatives), and with that, more resources that need to be extracted to produce more goods to back up that credit.
And all of that is expected to take place while the world population is expected to peak!
Do you now understand my point? We already need an additional earth in a current population where 70 pct live on less than $10 daily and the other 30 pct are counting on them to earn and spend more. For that 70 pct to live on more, then we will need more resources. In order for most to have middle class conveniences as promoted by Rosling, we will need an ave. ecological footprint similar to that of industrialized nations (as Rosling keeps pointing out), which is around 5 to 10 global hectares per capita, or with an expected population of around 9 billion, around four or more earths!