This Newsweek article by Fareed Zakaria, though lengthy, touches on many areas of importance, especially to us insular Americans.
The bottom line is that globalization makes other countries wealthier. This can only be good for all of us, as a nation with a functioning economy is less likely to engage in aggression or punitive trade habits, as those activities would damage the economy. (America is the apparent exception to this.)
America, and Americans, needs to accustom itself to being one among equals rather than the dominant hyper-power that it was for the last 20 years of the 20th century.
Take a deep breath, gains some perspective and realize that things are actually pretty good. And they look to get better. The future outlook for the world is rosier than it has ever been.