I'm not saying that other events didn't have a factor, but it is a particular event that drives the action. That is what I'm saying. The whole point of the mortals being responsible is that it goes back to the symbiont circle from TPM. As Obi-wan said, what affects one affects the other. The Naboo and the Gungans were both the dominant species on Naboo and both were affected by the Federation's invasion. The Jedi and the Republic were both affected by the Sith's revenge and in turn, the Force was affected by the war and the extermination of the Jedi. It goes back to the earliest writings of ANH, where Lucas wrote that the Ashla of the Force weakened as the Jedi Bendu was destroyed, leaving only the Bogan which was the dark side. The Force itself is and always has been two sides that were in contrast to each other and in the films, that contrast is damaged and needs to be repaired. The human aspect of the story remains because it is about Luke and Anakin and their issues coming to light. True, but the closest was in the rough draft and the revised rough draft of ROTJ, where Palpatine has been lead to believe that the threat was Luke only to find out it was Anakin who was the threat. EMPEROR Obi-Wan foresaw my destruction at your hands, young Skywalker, but it seems his vision was clouded…Perhaps there is still another Skywalker. Why can I not see, could the netherworld have influenced my perception? Another Skywalker…your father! Even though it wasn't a prophecy in the strictest sense, he was moving in that direction without locking it down until the PT. That's why I've pointed out what ROTS says on the subject with Yoda and Mace's doubts. Indeed. It may not seem like Lucas thought it through clearly, but he did. He's just not the best communicator of stringing it together like someone more traditional in directorial capabilities.