Basically, the hero invented a superstring computer, which is powerful enough to simulate the creation of different universes and everything after that. Unfortunately, the hero only simulates the model of our universe. With this model, computers can see the past and future of everything in the world.
But in the end, the world will be completely transparent, and anyone's behavior can be known by anyone. In this case, the ultimate outcome of fame is death, so the protagonist finally gave up releasing the technology. But he also calculated that human beings finally invented this technology and led to the ultimate demise of human society.
Mirror theme:
A completely transparent social form is impossible, at least in the human world. In addition, logically speaking, the computing power required by this technology is infinite, and a computer with this ability has a total amount of material, so it is impossible to calculate infinite data, so the computer's ability to predict the future will have a limit.