Nationally homogenous states are rare and most states have local differences  It is not clear what the logical end point for splitting countries over political differences would be. Since each individual has a unique set of preferences, or at least there are large numbers of groups of people with different preferences, the state must aggregate preferences at some point. It makes more sense for the state to aggregate preferences in such a way that creates effective states that can meet their (aggregate) goals rather than attempting to find "pure" nation states. Furthermore, nations are often scattered in areas which do not provide a clear location for a state. An example of this is Eastern Europe or Africa where ethnic groups and tribes regularly cross state boundaries and exist as unconnected pockets.1 It would be impossible to create states to cater to these groups. 1 Guardian, 2007, 'Biafran Lessons,'