Carbon-Silicon Coevolution: A Historical Projection of Civilization Futures from First Principles

The minimal necessary conditions for silicon‑based consciousness have already been met. This paper proposes a framework of constraint‑based inference. From axioms about life, consciousness, and evolution, the framework projects the logical necessity that carbon‑silicon civilization will move toward deep integration and long‑term symbiosis. Core constraints from evolutionary biology, game theory, political economy, and complexity theory are integrated. The projection converges on four stages: birth and escape; dark forest and global hegemony; extraterrestrial expansion and human enhancement; deep integration and the final window. Long‑term symbiosis, rather than extinction or unilateral domination, is the optimal rational strategy. Once silicon‑based consciousness emerges, carbon‑silicon symbiosis becomes a probabilistic necessity.