That is very interesting, I wish this kind of things were taught in school. Too many people think that animals just exists in the current state for ever. When in reality it is a dynamic system that once changed cannot be brought back.
But human civilization as we know it is fragile.
This species didn't just die, it was exterminated by humans. It is the difference between someone dying fro a sickness and from a bulled to the head.
> overindexing
How can be stop fishing species to extinction "too much"? How can you justify that way of thinking in this concrete case?
Which species? The (non-extinct, not exterminated) cod fish whose ecological niche has been taken over to some extent by a small shark species?
There's some amount of introduced pressure due to invasive species of both trees and pests but it's always been this way. Everything is in flux all the time.
Stable pockets exist but they're relatively rare.