[That was an interesting theory, most people fight to save there world, but one would have never thought of something like that. It gave her a moment to pause and think about it.]

There would be people who fight to save there world. Fight to bring life back into a world, but no one would think of destroying one world in order to save another.

[Her world had been destroyed, but because of that many others had been saved. But her world had soon come back to life thanks to her sister.]

However because one has to destroy one world to save many others... Doesn't mean one can't find a way to bring life back into it.