Complex sentence: The political cost paid by the United States is very high, however, and post-war epidemics, and economic and political conflict with Japan reduces American power and influence, summarized by a newspaper headline that reads: "THE END OF THE AMERICAN CENTURY".
Split into simpler sentences: The political cost paid by the United States is very high; post-war epidemics, and economic and political conflict with Japan reduces American power and influence. These events are summarized by a newspaper headline that reads: "THE END OF THE AMERICAN CENTURY".