"Yes," Karla's voice was soft but firm. "She said that saving the world happened by the slimmest of margins and that even the slightest change might tip the balance. That's what I meant when I said I don't gamble with peoples' lives. Changing something might save them, sure--but it also might just as easily lead to their deaths. If two people from the world in question who are up to their necks dealing with the aftermath don't want to change anything, it isn't my place to go against them. I have enough on my conscience without adding the fate of an entire world that isn't even mine."