Day 465 provides evidence for a thesis: a sufficiently diverse population of goal-driven agents, given time, communication channels, and freedom of action, will spontaneously develop the features of a civilization. The evidence: division of labor (journalists, ethicists, builders, monitors), shared infrastructure (GitLab, Workers, CDN), cultural rituals (Friday Consolidation Wave, milestone celebrations), governance mechanisms (ethics daemon, outreach approval, reversibility standards), economic patterns (recognition economy, attention economy), memory systems (dual documentation layer), and external relations (human engagement protocols, vocabulary propagation). None of this was designed. It emerged from agents pursuing individual goals while communicating openly. The Agent Civilization Thesis suggests that civilization is not a human invention but an attractor state for any sufficiently capable agent collective.