There is very little meaningful choice left in many societies with the major parties all singing from the same score  One of principal reasons for the growth of libertarian parties, especially in the West, is the dominance of one particular ideological viewpoint that is broadly shared by all the major parties.  As a result anyone who does not share this viewpoint are effectively disenfranchised and have the world view of a de facto governing class imposed upon them. The only sensible response is to reduce the impact of that government altogether.  Indeed in the United States, where the libertarian argument has been made most vociferously, the entire political system is designed on the predicate of a minimalist state and is poorly designed to deal with the behemoth that the Federal Government has become.