Divide et impera. Divide to conquer. Julius Caesar knew it. He wasn't the first. He's certainly not the last. Robert A. Heinlein made use of the concept in The Moon Is A Harsh Mistress: "Manuel, you wish to see Luna free." "You know I do." "You also know that Terra can defeat us." "Sure. No projection ever gave us anything close to even money. So don't see why you set out to antagonize-- "Please. Since they can inflict their will on us, our only chance lies in weakening their will. That was why we had to go to Terra. To...