Space Great Wall 1: Heart of the Firstborn

Four hundred years from now, to defend against the threat of interstellar storms, humanity will travel 35 light-years ahead of the Solar System and build a space wall 1.3 light-years long. As different groups take on different roles in the construction project, humanity gradually divides into three branches. After more than three thousand years of evolution, each develops its own independent civilization. Conflicts over a multitude of grievances erupt between the groups, even as they must confront the shared existential threat of interstellar storms. In the struggle and warfare between civilizations descended from the same human ancestors, evolved over countless ages, the deeper truths of the universe gradually come to light...