This final chapter extends co-intelligence (COIN) from enterprise transformation to society-wide design, asking what changes when co-intelligent architectures operate across the Nature–Society–Economy–Technology (NEST) nexus. A COIN civilization is not a society “run by AI,” but one in which intelligence is generated relationally through participation, learning is endogenous to action, governance evolves through feedback, and performance is evaluated through Sustainable Wellbeing Impacts (SWIs) rather than growth or efficiency alone. Using emerging exemplars, the chapter contrasts two architectural pathways toward a COIN civilization: a more centralized, sovereign-by-design approach illustrated by Saudi Arabia’s HUMAIN, and a more open, modular, ecosystem-driven approach illustrated by India’s Digital Public Infrastructures evolving into COIN-DPIs. Rather than competing futures, these pathways represent different design strategies shaped by institutional context, governance traditions, and societal values. The chapter then turns to “hard domains” such as agriculture and water as civilizational mirrors—domains that demand co-learning under uncertainty, fairness in trade-offs, and accountability for irreversible ecological thresholds—illustrated through cases such as MahaVISTAAR and the Water Data Exchange (WDE). The chapter reframes education as an Education Life-Xverse and EcoAI literacy as a foundational civic capability for meaningful participation in co-intelligent systems. Revisiting the Five Loci at civilizational scale, the chapter concludes that COIN futures are not inevitable; they are co-created design choices, inviting policymakers, builders, and citizens to actively shape wiser futures together.