After their failed attempt to contact home, the cast out Anu realised they had lost. There was nothing they could do to get in touch with their superiors at home who had not gone mad, and nothing they could to do take power away from the military.
All they could do now was to try and make a difference to this world and to humanity, that had been so damaged due to Anu interference.
They could not do this effectively as a group, and so they separated. They scattered through the world and took their knowledge with them. Wherever they found humanity, they would teach them about communication, recording history, medicine, and more. They are the ones remembered by many cultures as the Serpents of Wisdom.