Author of the classic works Crisis of the House Divided and A New Birth of Freedom, Harry Jaffa, now 91, hopes to write a third book on Lincoln, creating a trilogy. Today on Uncommon Knowledge, he discusses a couple of prevalent errors of which he intends to disabuse us. The Civil War, Jaffa insists, was a necessary war—an unavoidable war—and not a war of choice. And when the war broke out, anyone who had engaged in a cool calculation of the odds would have put his money on the Confederacy, not the Union.

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