My theory is that humans had their consciousnesses downloaded into the Exos and were sent from the future of another timeline to come back to Earth. "THEY brought US here..." I believe that Exos such as the Stranger and Lakshmi (FWC) are among the few whom didn't have damage to their memory circuits or whatever and know of the future. I believe that they traveled through a time gate to our timeline and many were messed up. But those with working memories are planning... Read the grimoire card of the Exo Thanatonaut. I believe he is killing himself to get glimpses into *his past* (an alternate future) because he is fighting on Jupiter (looking up at the torn sky) and on Mars in a timeline wherein the Traveler was not there to help us. Time travel will play a huge part in explaining this whole story.