Centers that may not be cities.

The plausible 2035 successor to every center in this archive is not a city but a distributed infrastructure: 200,000-GPU training clusters in Phoenix, Memphis, Inner Mongolia, the Gulf, Pori, the Hebrides; the agent-economy interfaces those clusters expose; the legal and capital structures that own them. If the 21st-century pattern holds — and it might not — the "center" of civilization for the next several decades may be the polity that owns the most compute.

If reusable orbital launch becomes ordinary infrastructure (cost-per-kg under $1,000 sustained), and if there is a sustained political appetite for off-world programs, a permanently inhabited Martian engineering settlement is the most natural next center in this archive's lineage. It would not look like an existing city. Closer to: Antarctic stations × a 19th-century railway town × Los Alamos × a research university. The civilizational question is whether such a place develops its own intellectual culture or remains a logistical extension of Earth.