Scaling Test Time Compute to Multi-Agent Civilizations

70+ min Noam Brown interview (2025-06-19) covering the full inference-time-scaling thesis: System 1 capability as prerequisite for System 2, wall-clock time as the hard ceiling on test-time compute (3-week reasoning cycles = 3-week iteration cycles), why self-play breaks outside two-player zero-sum games, implicit world models trumping explicit ones, harnesses/routers as temporary scaffolds. Highest-density single source — primary intake candidate.