<p>With only 6 percent of the world's population, how long will the United States remain a global superpower? The answer, David Boren tells us in <i>A Letter to America</i>, depends on asking ourselves tough questions. A powerful wake-up call to Americans, <i>A Letter to America</i>, forces us to take a bold, objective look at ourselves.</p><p>In <i>A Letter to America</i>, Boren explains with unsparing clarity why the country is at a crossroads and why decisive action is urgently needed and offers us an ambitious, hopeful plan.</p>