An analysis of a lesser-known aspect of America's national political origins explains how everyday farming families were drawn into an insurgency that became the Revolution, describing the belief systems and organizational efforts that fueled resistance to British oppression.

Over eight years of war, ordinary Americans accomplished something extraordinary. Far from the actions of the Continental Congress and the Continental Army, they took responsibility for the course of the revolution. They policed their neighbors, sent troops and weapons to distant strangers committed to the same cause, and identified friends and traitors. By taking up the reins of power but also setting its limits, they ensured America's success. Without...