While neither the island nor the Earth has been destroyed, unless certain questions are answered, the end of this world, to us, is still inevitable. The circumstances dictate it.

It's surprising to me that no-one else has realized this.

EDIT

Because we may not exceed its boundaries, this island must be considered our world. If we accept the separation of the local humankind from the population of the fictional; fictional humankind possesses only twelve percent of a minimum viable population. Unless their biological advantages are extremely different, fictional trollkind has the same limitations.

This indicates that we are the final generation. Only if fictional humans and local humans are cross-compatible does the genetic line of our homeworlds have any chance of propagation. Without that, our worlds will end when we do.

In either case, to avert the end it is imperative that each of us chooses to "act so that the effects of your action are compatible with the permanence of genuine human life."