The 21st century is very different from the 20th. The U.S., though still the most powerful, can’t keep everything under its thumb. Watching the U.S., the word I can use is 'anxiety.' It has so many problems of its own while trying so hard to handle many of the world affairs in the old way. This is not going to work and the U.S. needs to learn to adapt to the new world environment where the ground is shifting. In this changed world, countries have to work together, meaning accommodating and even making compromises when needed. The U.S. may need to change its way of looking at world issues.