Humanity fragments, peacefully and beautifully. Different groups use their aligned superintelligent AI to build radically different civilizations, each flourishing on its own terms. Some optimize for individual freedom, others for collective harmony, others for exploration, others for things no prior culture imagined.
There is no single human future anymore. There are hundreds, coexisting and thriving, each a different answer to what it means to live well. Pluralism at civilizational scale.