So the story of why the parasites are there. So there is a intergalactic war going on where a alien species is suffering. They need more soldiers, and seeing that the planet Earth had intelligent life they figured it would be perfect. They dropped off a supply of the parasites they had, and let them run wild. When there was enough to cause world wide take over there was a mass suicide. This caused all of the Evolved to pop up. After 8 months and 143 million deaths later there was an end to all of the destruction. Now all of the Evolved work as members of society, but are casted out by many survivors especially Hunters. They are planning on trying to find ways to kill the Azlindines(The aliens that sent out the parasites) after they return for their warriors.