The basic BHS model has been adopted in all advanced economies and it is aspired to by most leaders in almost every developing country. Universal adoption is easy to explain: the BHS works well. It has delivered a reasonable mix of prosperity, protection and social support. It has proved remarkably sturdy. Since the Second World War, no BHS country has had collapsed into chaos, become impoverished or suffered fundamental social breakdown. The system is also popular with voters, even if many government-hating Americans hate to admit it.