Some political commentators have argued that continental trading blocs are natural political units and these views were popular in the early and mid-20th century. For example, in his 1948 novel, "Nineteen Eighty Four", George Orwell suggested that global power would consolidate into three trading blocs defended by military power that was constantly shifting alliances so that two would be aligned against a third. His blocs were Eastasia, roughly the Chinese sphere of influence, Eurasia, and Oceania, the Nearctic and Neotropic zone plus most large islands (British Isles, Australia, New Zealand).
However, with the exception of the European Union, there has not been much interest in giving free trade zones existence outside of the economic sphere. Moreover, many advocates of globalization are opposed to continental trading bloc when they inhibit global trade flows.