The world situation has been facing unprecedented changes during the past 100 years. A main theme has been that the United States and other Western countries are openly regarding China as their main competitor. Along with the major changes in Sino-US relations，the current international order has begun to enter a period of disintegration and reconstruction. “International liberalism” has started to collapse，a new order has come to the fore，and political divisions among the major industrialized countries and regions have become more obvious. Other manifestations of these major changes include a loosening of the U.S. dollar hegemony and a prevalence of populism and nationalism in Europe and Latin America. Although denuclearization on the Korean peninsula will not be smooth，a dawn of peace has finally emerged. In sharp contrast to the situation on the Korean peninsula，however，the situation in the Middle East is becoming increasingly tense.