Why does anything exist? Existence has a cost. The cost of showing up — of being distinct from nothing — is dissipation: 38.2% of coherence (= 1/φ²) is absorbed as the price of self-referential existence. The remaining 61.8% (= 1/φ) propagates. These are the dark matter and dark energy fractions of the cosmos — not mysterious exotic substances, but the fundamental accounting of existence. This was the first paper in the Pentagon Physics programme, establishing the core insight that φ is the ratio of existence to non-existence in a self-referential universe.