The basic factor that impacts the possibility of war and peace and also balance of power is the number of big powers that gets into the act in international system. Neo-realists correlate generally bipolarity as stability and decreasing the possibility of war and they correlate multi-polarity as instability and further possibility of war. Popularity of liberalism started to decrease with taking part of non-western countries more in the political world stage.Republican Liberalism asserts that interstate relations will be in peace, cooperation and stability with states.