[Listen, he just collects and provides the information, he doesn't make this shit up.]

It could have been what led to or even exacerbated the problem in the first place. There's really no telling with just these parts of the puzzle. Did they know the darkness was coming and do something to prevent it? Or did something start happening on their world and they sought ways to fix it...not knowing what they'd be inviting in.

Either way, you're right, we NEED to learn more.