Noun
bipolarism (countable and uncountable, plural bipolarisms)
(politics) The characterization and practice of politics as the struggle and balance between left-wing and right-wing powers or ideologies.
The system had been nicknamed the imperfect bipolarism, referring to more proper bipolarism in other western countries (the United States, Germany, the United Kingdom, France etc.) where right-wing and left-wing parties alternated in government. Source: Internet