On right and left, it has become easier to imagine ways the liberal order might deserve to fall, because of evils generated from within itself.
On the right, that imagining extrapolates from examples like the Low Countries’ euthanizers toward a future society that remains formally liberal but resembles Aldous Huxley’s “Brave New World” — dominated by virtual reality and eugenics and mood-stabilizing drugs, post-familial and post-religious and functionally post-human. Would such a society deserve the political loyalty of (let us say) a traditional Christian or Muslim, just because it still affords them some First Amendment protections? It is reasonable to say that it might not.
On the left that imagining takes the form of a dire ecological extrapolation — a fear that climate catastrophe isn’t inevitable despite liberalism but because of it, that the combination of governments with limited powers, publics with limited knowledge and corporations with capitalist incentives might be responsible for civilizational disaster. Does this scenario (or other equivalents involving A.I.) call liberal proceduralism into question? For some Carl Schmitts (or Ted Kaczynskis) of the left, it might.