Theory of world politics aims to explain the evolution of the basic nature and institutions of international relations and domestic politicsThe advancement of scientific technology and the struggle for recognition are the two kinds of momentum for world political evolutionThese two kinds of momentum colead to the emergence,enhancement and decline of different political thoughts,and the change of power distribution among different groupsThe rise and fall of political thoughts are a kind of direct momentum for world political evolution that shapes the basic nature and institutions of international relations and domestic politics at the same timeInternational and domestic political struggles are the function mechanisms in shaping the rise and fall of political thoughts and transferring political thoughts into basic institutions in international relations and domestic politicsThere are three interactive patterns in the political struggle mechanism:domination by strength,internalization through learning,and political compromise