Academic warns of shortages
Professor Robert Pape warned on social media that naval blockades could cause imminent global shortages of critical goods within ten days, a post that drew wide attention. (x.com).
University of Chicago political scientist Robert Pape said Sunday that shipping disruptions around the Strait of Hormuz could produce shortages of “critical goods” within 10 days, not just higher prices. (threadreaderapp.com) In an 11-post thread, Pape said the world had moved from a “price shock” to an early “system-wide supply shock” and argued that factories stop when materials do not arrive. He wrote that about 20% of global oil flows through the Strait of Hormuz and said inventories were already being run down. (threadreaderapp.com) Pape is a professor of political science at the University of Chicago who specializes in international security affairs and has published work on sanctions, coercion and war. He directs the Chicago Project on Security and Threats, a research center at the university. (political-science.uchicago.edu) The warning landed as the United States military said it would begin blocking shipping to and from Iranian ports at 10 a.m. Eastern time on Monday, April 13. Reuters reported the move could keep roughly 2 million barrels a day of Iranian oil off world markets. (usnews.com) Hormuz is a narrow sea lane between the Persian Gulf and the Gulf of Oman, and traffic there affects far more than crude oil. A 2025 paper in Nature Communications said about 21% of global petroleum consumption is shipped through the strait and described maritime chokepoints as vulnerable points with few alternative routes. (nature.com) Global trade depends heavily on a small number of those chokepoints. The same Nature paper said maritime transport carries 80% of world trade by volume and estimated $192 billion in annual trade exposure at chokepoints, while the United Nations trade agency said disruptions in the Suez and Panama canals had already driven delays, rerouting and higher costs in 2024. (nature.com) (unctad.org) The United Nations Conference on Trade and Development reported in October 2024 that traffic through the Panama and Suez canals had fallen by more than 50% from their peaks by mid-2024. It also said tonnage through the Gulf of Aden and the Suez Canal was down 76% and 70%, respectively, from late 2023 levels. (unctad.org) Reuters also reported that United States Central Command later said the blockade would apply only to ships going to or from Iran, not to vessels using the strait for non-Iranian ports. Iran’s Revolutionary Guards said military vessels approaching the strait would be treated as a ceasefire breach, and retired Admiral Gary Roughead said Iran could attack ships or Gulf infrastructure. (usnews.com) Pape’s post went wider than a normal academic thread because it turned a military move into a household claim: shortages within days. His main test was simple and specific — watch ship flows through Hormuz this week, because he argued that by the time shortages reach headlines, the disruption is already well underway. (threadreaderapp.com)
