The Last Restarter

Every 5,000 years or so, after the development of human civilization reaches a certain critical point (technological, social, environmental or ethical collapse), a "doomsday reckoning" will be triggered. At this time, the "system" (a monitoring and intervention device left behind by a super-ancient civilization) will select a "restarter", keep its consciousness intact, and send it back to the starting point of the civilization cycle (usually a prehistoric or ancient key node, such as the eve of the agricultural revolution, before the birth of writing, etc.). Restarters live again with all their memories, trying to guide civilization to a different path that will not perish. If the new cycle still comes to an end, the system will recycle the memory of the restarter at the last moment, restart again, and erase some of the emotions of the restarter to maintain rationality. Each time you restart, the basic parameters of civilization (such as resource distribution, climate, initial tribe location, etc.) Will change slightly, but the essence of human beings remains the same.