Peak civilization era

This is a hard science fiction. In 2271, humans suddenly found an unknown barrier at the edge of the Oort Nebula in the solar system, which seems to break the causality. After some efforts, human beings finally left the solar system, experienced countless explorations and wars, and gradually became the peak civilization of the three-dimensional universe. They opened the secret behind their unique form of existence, looked for their own origin and made an impact on the peak evolution