GEOSUPPLY: When “Code is Law” Breaks Down — A Critical Review of Blockchain-Enabled Supply Chain Smart Contract Failures Under Geopolitical Force Majeure and a Human-in-the-Loop Governance Framework for Resilient Global Trade

Blockchain-enabled smart contract systems have been widely deployed in global supply chains to automate payment release, enforce delivery penalties, and rank supplier performance using machine learning. These systems operate under a foundational assumption: that contractual non-performance is always attributable to a party. The 2026 Strait of Hormuz crisis --- triggered by coordinated U.S.--Israel military strikes on Iran on 28 February 2026 --- exposed this assumption as catastrophically wrong. With Iran making 21 confirmed attacks on merchant ships, Maersk, CMA CGM, and Hapag-Lloyd suspending transits, QatarEnergy declared force majeure on liquefied natural gas exports, and approximately two million twenty-foot equivalent units of cargo stranded in Gulf ports, existing blockchain supply chain systems automatically withheld supplier security deposits, flagged innocent suppliers as non-performing, destroyed machine-learning-derived reputation scores, and locked payment escrows with no governance pathway for release. No existing blockchain supply chain paper addresses the intersection of on-chain force majeure recognition, ML supplier ranking exclusion during geopolitical disruption, human-in-the-loop non-fault adjudication, tri-state payment escrow management, and parametric geopolitical insurance triggering. This paper conducts a systematic review of the blockchain supply chain literature published between 2016 and 2025, encompassing peer-reviewed journal articles, conference papers, and industry technical reports spanning food safety, pharmaceuticals, logistics, trade finance, and maritime shipping, --- and documents seven structural governance failures exposed by the Hormuz crisis. We propose the GEOSUPPLY framework: a Geopolitical Oracle-Mediated Supply Chain Governance system that integrates verified multi-source geopolitical event oracles, a Geopolitical Context Injection Layer for ML ranking isolation, a Tri-State Escrow Contract TriStateEscrow.sol, a Human-in-the-Loop Dispute Resolution Committee with on-chain multi-signature governance, an Alternative Supplier Activation Protocol, a Parametric Geopolitical Insurance Oracle GeoRiskInsurance.sol, and a Sanctions-Compliance Layer. We illustrate GEOSUPPLY's governance logic through four real-world scenarios drawn from the 2026 crisis. Theoretical analysis demonstrates that GEOSUPPLY preserves blockchain immutability while providing the contextual flexibility that geopolitical reality demands --- a combination that no prior work achieves.