The 1600 BCE Horizon: A Pan-European and Mediterranean Systemic Disruption — Synchronous Cultural Terminations, Trade-Network Severance, and the Thera Eruption

Between approximately 1650 and 1520 BCE, a geographically unprecedented number of Bronze Age complex societies across Europe and the Mediterranean underwent collapse, transformation, or terminal reorganization. The Únětice culture in Central Europe, the El Argar polity in southeastern Iberia, the Neopalatial civilization on Crete, the tell-based Ottomány–Füzesabony cultures of the Carpathian Basin, and the Hyksos Fifteenth Dynasty at Tell el-Dab'a in the Nile Delta all exhibit evidence of violent termination, organized abandonment, or fundamental structural transformation within a chronologically compressed window centred on ~1600 BCE. Simultaneously, Scandinavia experienced not collapse but emergence — the "breakthrough" of the Nordic Bronze Age — driven by a total reorganization of copper-trade networks. This working paper maps these synchronous terminations against the updated radiocarbon chronology for the Thera eruption (~1612–1602 cal BCE, 1σ, Manning 2024a). It argues that the primary mechanism of transmission was not volcanic winter but trade-network severance: the Thera eruption destroyed the Aegean maritime hub that connected the Mediterranean, Central European, and Atlantic trade networks. Societies whose political economies depended on controlling access to bronze — a commodity that required long-distance trade by definition, since copper and tin are never co-located — lost both their supply chains and the economic basis of their political legitimacy. The paper proposes a three-outcome typology for trade-network severance: (1) sudden collapse in hub-adjacent, totally dependent societies (Únětice); (2) gradual degradation over decades in peripheral societies whose internal vulnerabilities were masked by trade-subsidized prosperity (El Argar); and (3) metamorphosis in flexible societies that established new trade connections (Scandinavia, Mycenaean Greece). The geographic scope of the disruption — approximately 4,000 km east–west and 3,000 km north–south — exceeds the reach of any single military campaign and eliminates the traditional attribution of the Levantine MB/LB destruction horizon to the campaigns of Ahmose I. Biblical Chronology Research Working Paper No. 2. Companion to: Kiss, B. T. (2026), The Sinai Convergence (Zenodo, DOI: 10.5281/zenodo.20072469).