Here’s a paradox: Nothing exists for a social system other than what it can observe for itself; thus, for a world without the system to exist, the system would have to be present to observe it.
A self-referential system cannot conceive of a world in which it does not exist; the system cannot conceive of its own ending. It must always assume there is something coming next. Self-reference is always tautological. It goes in circles. Beginnings and endings can only be observed from the outside, by other observing systems. This is why for self-referential systems the world is endless.