The document discusses the factors that have contributed to the recent rise in popularity of the United Kingdom Independence Party (UKIP) in British politics. It examines the existing literature on UKIP, which largely attributes the party's success to disenfranchised working-class voters, but argues this only provides a partial explanation. The document proposes that a full understanding requires analyzing the convergence of the major parties around the political center, as well as the impact of contemporary political events, using theories of party competition and populism.