T he United States has been shaped by three far-reaching political revolutions: Thomas Jefferson’s “revolution of 1800,” the Civil War, and the New Deal. Each of these upheavals concluded with lasting institutional and cultural adjustments that set the stage for new phases of political and economic development. Are we on the verge of a new upheaval, a “fourth revolution” that will reshape U.S. politics for decades to come? There are signs to suggest that we are. In fact, we may already be in the early stages of this twenty-first-century revolution.

The great recession that began in 2008 caused many to suggest that the United States is entering a period of “decline” during which it will lose its status as the world’s most powerful and prosperous nation state. The metaphor of “decline” presumes that the American people will sit by passively as their standard of living and...