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Political polarization is the divergence of political attitudes away from the center, towards ideological extremes. Scholars distinguish between ideological polarization and affective polarization. Most discussions of polarization in political science consider polarization in the context of political parties and democratic systems of government. In two-party systems, political polarization usually embodies the tension of its binary political ideologies and partisan identities. However, some political scientists assert that contemporary polarization depends less on policy differences on a left and right scale but increasingly on other divisions such as religious against secular, nationalist against globalist, traditional against modern, or rural against urban. Polarization is associated with the process of politicization.