Yet his rationalism proved invaluable to the republic not just at its founding but at its moment of greatest crisis, when it had to break with its historical past and square the circle he himself couldn’t square. At Gettysburg, in the midst of the Civil War, Lincoln invoked the words of the Declaration of Independence to explain what the war was about: that the nation “conceived in Liberty, and dedicated to the proposition that all men are created equal” needed “a new birth of freedom” to include all men in that proposition. The abstraction, not the history, was at that moment our true national identity. And in the ever-growing consciousness of man’s freedom that is the true meaning of history, Jefferson might have said, so it became.In Lincoln's speech the two competing threads of America as it is dreamed and America as it is lived came together at a critical moment, and the nation was revived. For many Americans World War II represents a similar moment. But what becomes of America now when the Shock Doctrine replaces the Declaration of Independence, and the reality of competing interests becomes the tyranny of wealth and power?
All-in-all a great article that's also rich in biographical details.