http://www.economist.com/news/britain/21677221-how-britain-turned-ruins-its-empire-mighty-entertainment-imperium-spectre
There are two ways of looking at this. The first is to situate the roots of Britain’s entertainment boom far in the past; in the Industrial Revolution and the colonisation of North America, India and parts of Africa. Yet Bagehot spies a more recent turning point: Britons successfully export their films, music and books to the world not thanks to the empire per se, but to the nature of its decline and their subsequent reaction.