Greg Bear’s 1979 Hegira is a stand-alone far-future megastructure science fiction novel. Hegira was Bear’s debut novel.
A structure far larger than fabled Earth, Hegira is home to a multitude of human cultures. In other contexts, worlds of Hegira’s scale might have ensured that communities diverged radically from each other. Hegira has obelisks, which have made all the difference.