“But I can’t go along and gatecrash.” “Nonsense, of course you can come—a guest from England! You’ll be the lion of the party. Probably half a dozen … - Fred Hoyle

The concept here is that a highly organized society can collapse through a population overload, even though the people themselves are not starving. It is the organization that ultimately becomes overloaded and collapses.

So far from proceeding in this way, the really curious feature of every organization in which it has been my misfortune to be involved is that while people argue vociferously and almost completely without data about all projected changes they show a little or no interest in the effects of changes after they have been introduced.

One could conceive of other abstract systems, the consequences of which could be calculated, without it being necessary to provide a realization in actual material terms. We can conceive of other universes without those universes being compelled to exist. This indeed is the business of the pure mathematician.