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I've seen this take before, especially around climate and the environment. It's correct that having 20,000 humans on Earth would be more (actually indefinitely) sustainable. These "degrowth" strategies mean tremendous suffering. People have to die to make degrowth possible. Those who stick around have to suffer of curable medical complications. They have to live hard lives without the comforts of modern life. Why do…
The best "degrowth" argument I have seen is from a physicist [0]. His argument is based on hard limits to the amount of waste heat produced by energy consuming (i.e. all) activities of humanity. He shows that if the current rate of economic growth continued for the next 400 years then humanity would be consuming more energy than in all the sunlight reaching earth and would produce enough waste heat that the surface o…
However.
We are still very early in the curve. We are warming the planet, but not because of any energy we are producing, merely because of a chemical inbalance in the atmosphere. We are not close to any of the limits specified there.
When energy costs 0.0001 / kWh, we may re-evaluate. But we have a long way to go before we get there.
It's so early!