Cold War After that, U.S.A Became the only one in the world Superpower 。 This situation, on the one hand, makes the American government's desire to dominate the world more expansive, so it speeds up the implementation hegemonism and Unilateralism Foreign policy; On the other hand, the old balance is broken, and the new balance is difficult to establish at the moment. The space left by the disintegration of the bipolar pattern is objectively conducive to World multipolarization Trend development. Major changes have taken place in the relationship between major powers, including the hostile countries during the Cold War. Many countries, including the United States ally Both require the United States and its partners to respect each other, be equal and mutually beneficial, and promote common development and prosperity through dialogue and cooperation, which makes it increasingly difficult for the United States to pursue unilateral expansion policies. Since the end of the Cold War, the speed and scale of European unification, independence and self-improvement have attracted attention. EU implementation European Union Treaty , expand and improve the common market, and issue euro , establish monetary union And then pursue a common foreign policy and defense plan, and a unified constitutional reform, and European Union and North Atlantic Treaty Organization The expansion of Europe To become an important member of the pluralistic world without making any noise. They have made their own voice, put forward their own ideas, and established the image of a force as a whole. The Soviet Union and the United States“ Superpower ”One. In 1991, when the Soviet Union collapsed, Russia inherited 80% of its strength United Nations Security Council Big Five Permanent members , has veto power 。 Russia is the second largest military power in the world, with strong military strength and nuclear weapon Library. Russia is also a world power with great influence in many fields such as culture, economy, military, politics and science and technology in the world, and it is also the largest and most important country in the world Economies one of. Since the implementation of the reform and opening up policy, China has followed the Deng Xiaoping Pioneering The socialist path with Chinese characteristics With rapid economic growth and remarkable construction achievements, comprehensive national strength China's international status has been greatly improved by its remarkable growth and long-term political and social stability. Although there is still a gap between China's national strength and that of the United States, China's rise as the world's largest developing country, as well as its adherence to principles, non alignment, no leadership, no fear of pressure, and no belief in evil in the international community, can not be wrong World pattern Have a significant impact. From 1956 to 1990, Japan's economy began to grow at a high level for 30 years, known as "Japan's post-war economic miracle".
Japan And family Japan is Group of Eight 、 G20 、 World Trade Organization 、 APEC Member States. Japan's citizens have a very high standard of living, and it is one of the countries with developed economy and high standard of living in the world. Japan is one of the powerful countries in the world today. Its scientific research and development capability leads the world, and it has always been in the forefront of the world in military, education, medicine, industry, etc. In terms of India, although India is recognized as a major country and has developed rapidly in recent years Indian economy The foundation is too weak, and the weapons and equipment are too dependent on other countries（ military force Is the last line of defense of the country) nuclear weapon However, India lacks enough strategic strike capability to deter the United States and cannot be called "strong" together with China, Russia and the European Union. Therefore, India seems to have strategic space, but in fact it is only because of the strategic consideration and decentralization of the United States to contain China. Not to mention other countries. As for Brazil Basic entity However, it has advantages in terms of land area, population and resources. But economically, politically, militarily and diplomatically, it is far inferior to China, Japan and Russia. Brazil has a vast territory, but the resulting transportation pressure is relatively large. The population distribution is too concentrated in the southeast coastal areas, and has been reduced to colony Caused national economy The abnormal development of Brazil has become a factor restricting its development. 
