Once we defeated the alien Ceph by closing their wormhole and defeating Alpha Ceph, the world, human civilization, had to change drastically, to accommodate Prophet into the system. We have endorsed a more hive culture as given to us by them. Lose our individuality, live as a unified race but more advanced than prior to invasion. It was about Prophet becoming that anomaly, who raised the Ceph and coaxed them to evade wipe out humanity. Then the Manhatten virus was also spread by Prophet to bring the Ceph out into the open, keep them arrogant. Their People who once terrorized civilizations were then eradicated, the reduced human population now consisted more elevated &, enlightened folks who would not fight among themselves or kill for sport. This meant that we really were now free and dominant species on Earth, not agents of ETs. Started living the life of real indeginous life forms living in harmony with nature, ushering in several new ground breaking technological advancements, that we will persevere and live in peace!