Board Thread:Destiny Forum/@comment-69.228.33.19-20140721002858/@comment-96.250.89.146-20150209133323

As I read the reddit post by bravosuluzero about the Traveler, I realized some holes in my theory. When the Traveler encountered the precursor race to the Vex and Hive clans, they were given their gift. This separated the body and mind, giving them new purpose. They were amazed by the Traveler's tech. So they asked for more. As this continues, they grow more jealous. They realize they will never get all of its tech. This spawned the Darkness. And the first battle. They carved of some of its flesh. That is what they used it not just to corrupt the Traveler, but to store the one thing they couldn't. Souls. As for the Nine, we'll they will play a large part of the story, larger than we thought. They built the Traveler. Why else would they help us. To recover it.

~Phantom of the Wiki