“Of course things would never reach that point. Long before the nursing home phase old and defenseless societies would be systematically looted and taken over by high birthrate outsiders who will have grasped the unattended levers of power. This the way the world ends. Not with a whimper, but with a suffocated scream.”
Indeed.
—

But hollow men, like horses hot at hand,
Make gallant show and promise of their mettle;
But when they should endure the bloody spur,
They fall their crests, and, like deceitful jades,
Sink in trial.

Julius Caesar VI.ii