Currently halfway through the trilogy and I'm kind of confused on the whole thing. If anyone who's played through the series could help me out it'd be much appreciated. 1. Where did the markers come from? 2. If markers infect dead tissue, where did the hive mind come from? 3. Why does Unitology want the markers so badly even if they know it kills everyone? 4. What do markers do, besides sending out signals and resurrection?