This is just a fun theory but I think the traveler is a big ball of crack and we got so high he just got these powers, and the fallen want the crack back, but since the big ball of crack won't accept them they set out to destroy it. Then the darkness was like bro GIVE ME THAT CRACK and we told them to go suck a dick, ended up in a war with them. The Cabal just wanted a little taste but we also told them to go back to their empire and go blow that up. ( yeah they really hate us for that ). And then the Vex are just there. Like no one cares about them. Vex- * sad face *