Sorry to ask this--I have a hard time remembering every detail in books I read. Can someone refresh my memory, I'm sitting here thinking about it at work so obviously don't have the book next to me.
Why, again, did the Caeliar super-civilization send that feedback pulse to cause all the destruction in the first place? Was it simply because they had figured out that it needed to happen to keep history going, or was there some other motive?
Thanks in advance.