These people unironically claim that we are in "ecological overshoot", and that if we don't cut back on our current agricultural practices, then the food supply will completely collapse, if not from peak natural gas cutting off synthetic fertilizer, then from aquifer depletion or soil erosion. The people claiming that we need to cut back on farming or cut out meat consumption view themselves as longtermists; a little starvation now to avoid massive starvation later.
I'm not even exaggerating. That's literally what they believe:
The astonishing story of how a movement’s quest for rural simplicity drifted into a formula for mass death.
theecologist.org
If so, they or their philosophical descendants are bound to end up at gunpoint.
I don't know when, or who will be holding the gun.
But when rubber meets the road there is no grand *we* in world politics, and we know exactly what sort of idiot idealists believe otherwise.
One could make an argument that some countries are.
But the royal *we*?
No, not really. Most countries do not see it this way. China, Russia, India and the like would certainly disagree. Some others are more than fine food supply wise and their agricultural production records state they understand such matters better than some ridiculous green-red doomsayers.
Eventually either more people will tell them to take their bullshit to China, more people will do to them what China would if they took their bullshit there, or China will be the only industrial power left standing.
Besides, they have some regional experience with ideas along the lines of trying to run countries on collectivist, simple rural agriculture by force, and they know the consequences.
They are idiots, it's that simple. Delusional ideologues believing in things so divorced from reality that they that take a lot of education and sheltered life of comforting bubble to entertain. Useful or useless, that's the important question.
Useful to who?
As someone put it already a long time ago, why is there no "climate movement" in China?
Because China is already communist.