Let me get this strait: the Iran-war escalation risk

What It Covers

The Economist's Intelligence examines three stories: the strategic crisis unfolding around the Strait of Hormuz as Iran's de facto closure threatens global oil supply, China's rapid humanoid robot industry expansion, and the neuroscience behind optimal power napping, including ideal duration and timing.

Key Questions Answered

• •Hormuz closure mechanics: Iran does not need a physical naval blockade to shut down the Strait of Hormuz. Sporadic missile and drone attacks — roughly one per week — are sufficient to deter commercial shippers and insurers from transiting the 54-kilometer-wide strait, through which approximately 15% of global oil normally flows. This asymmetry makes reopening the strait extremely difficult for the U.S.
• •Oil bypass pipelines: Saudi Arabia's East-West pipeline moves up to 7 million barrels per day — two-thirds of Saudi output — to Red Sea ports, while the UAE pipeline connects to Fujairah port, handling roughly half of the UAE's 3.6 million daily barrels. Both routes bypass Hormuz entirely, but Iran has already begun targeting these facilities with drone strikes to eliminate the workarounds.
• •Kharg Island escalation risk: Kharg Island processes approximately 90% of Iran's oil exports. U.S. strikes have already hit Iranian military positions there, and analysts assess this as potential preparation for a seizure attempt. However, holding the island under sustained Iranian missile and drone fire from the mainland would be operationally difficult, and cutting off Iranian oil revenue may not compel a regime deal.
• •China's humanoid robot supply chain: China delivered roughly 14,000–15,000 humanoid robots in 2025, a fourfold increase year-over-year, with approximately 100–120 companies producing finished units and thousands more supplying components. A single district in Changzhou claims to source 90% of humanoid parts locally. By contrast, Tesla's Optimus shipped an estimated 150 units globally in the same period.
• •Power nap optimization: A 10–30 minute nap taken between 1–3 PM improves afternoon alertness and memory more effectively than caffeine, according to research. A 1994 NASA study identified 26 minutes as the performance-optimizing duration for pilots. Napping past 60 minutes regularly increases diabetes and cardiovascular risk. Consistent daily napping, not occasional napping, produces the cumulative 37% reduced heart disease risk identified in studies.