Economics & Finance / Macroeconomics / Economic Growth & GDP

A Temporary Shock That Lasted 35 Years: How the US Civil War Permanently Changed UK Cities

Did you know a temporary economic shock can permanently reshape entire cities—even decades later? In this deep dive, we explore a landmark study by economist W. Walker Hanlon from his 2014 paper 'Temporary Shocks and Persistent Effects in Urban Systems: Evidence from British Cities after the U.S. Civil War.' The U.S. Civil War (1861-1865) caused a massive cotton shortage that hit British textile towns hard. But here’s the shocker: the impact didn’t fade. Instead, it permanently reduced population growth in those cities for at least 35 years, with no recovery. More surprising, the damage spread beyond textiles to local machinery and metal industries—capital suppliers that never regained their edge. This video breaks down how a temporary shock locked cities onto a lower growth path, why capital suppliers were the hidden weak link, and what this means for modern cities like Detroit. Watch to uncover why diversity matters more than you think.