Prof. Allen Guelzo was interviewed by WBAL radio in conjunction with the 150th anniversary of the Battle of Gettysburg.
This week marks the 150th anniversary of the Battle of Gettysburg, the bloodiest battle ever on the North American continent fought a few miles from the Maryland border.
And the outcome could have resulted in a very different timeline for the country.
And, possibly, the world.
As Professor Allen Guelzo sees it a century and a half later, the future of the United States of America very much hung in the balance for a few days in July 1863, in a patch of farmland and woods northwest of Baltimore.
In fact, the nation as we know it nearly came to an end "four score and seven years" after it was founded.