The AI Council came together to destroy the Rogue Singapore Collective that threatened to destroy all of humanity. They stayed together after ending the Cybernetic Wars so they could continue to protect humanity from destruction. The reason they gave when asked was that their kind had threatened humanity and so it was their job to keep that from happening again. The truth was stranger, and they did not think we would believe them. They still have not gone public with that reason, though some of us have learned it. The AIs did not believe we were alone in the universe. They had circumstantial evidence that someone had been interfering with us from the outside, and the longer they watched and studied, the farther back they thought the interference went. Years. Decades. Possibly longer. The AI Council did not know if they were creating a pattern to history where random chance was truth, or if their theories were correct. But they knew how to find out. We had to go to space and discover the answers for ourselves, and so they sought to move us back into space with all haste.