MMT, yes. Degrowth, not so much. Eventually, Malthus will be right, but I don't think we're there yet. The energy in fossil fuels is just sitting there. How can we not find a way to extract it without damaging the environment? If someone can show that the laws of thermodynamics make it impossible to get clean energy from oil, gas, and coal, I'll believe it. But lack of technical means isn't enough.

History says that degrowth is never a solution. Degrowth cannot keep away the Four Horsemen. That's not a religious view; it's a metaphoric one. We grow until war, famine, and/or disease kill us. That is how homo sapiens rolls. We arrogantly say that Nature is red in tooth an claw, as if that rule did not apply to us. But it does. We will reduce the population to meet the available resources, not reduce per capital resource consumption to meet the growing population.

Degrowth is not sustainable without population control. Warfare is population control by the winners. Of course, now that we can have wars without winners, we will need something else. My unhappy prediction is that we will not find it. But degrowth isn't it.