Until the 20th century, Iceland relied largely on fishing and agriculture. Industrialisation of the fisheries and Marshall Plan aid following World War II brought prosperity and Iceland became one of the wealthiest and most developed nations in the world. In 1994, Iceland became party to the European Economic Area, which supported diversification into economic and financial services. In 2008, affected by the worldwide crisis, the nation's entire banking system systemically failed, resulting in substantial political unrest. In the wake of the crisis, Iceland instituted "capital controls" that made it impossible for foreign investors to take money out of the country, leading to the Icesave dispute. The economy has since then made a significant recovery.[9][10][11]