What Abraham Lincoln had to face was a culturally and politically cohesive bloc of states comprising half the country, refusing to discuss even the limitation of slavery; while he had only the most feeble means of enforcement. The British and the French could do their emancipating at a distance; Lincoln had armed resistance almost literally at his doorstep.

Abraham Lincoln did have intellectual instincts, a tremendous curiosity on a broad range of subjects, and a near-photographic memory for what he read. He was, at the end of the day, a politician: politics were his heaven, said William Herndon. But Lincoln did take comfort in ideas and books, more so than almost any other president, and he went to books and ideas in moments of perplexity to sort things out. Philosopher, no, but thoughtful and "surprisingly well-read" for his day.

I don't know that there has ever been a time when Abraham Lincoln didn't stand head-and-shoulders above all other presidents in the historians' eye. But relatively speaking, there have been peaks and a troughs. One peak was in the 1910s-20s; a major trough was in the 1970s-80s. We are certainly on a peak again, something which began in 1994 with Michael Burlingame's 'The Inner World of Abraham Lincoln,' which showed in fabulous detail how many new and untapped sources were available on Lincoln.

Stephen A.Douglas was a risk-taker by temperament; I expect that Lincoln - Douglas debates represented another risk he just couldn't resist. He lived to regret it.

One thing which Stephen A. Douglas was temperamentally incapable of doing was admitting he was wrong. He always believed that 'popular sovereignty' - the core doctrine of the Kansas-Nebraska Bill - was the right solution to the slavery controversy; and even though it had failed to solve much of anything in Kansas and Nebraska, he stubbornly insisted that this was because it had never been adequately tested.

It is possible to have pardon without forgiveness-a murderer can be pardoned by the governor, but that does not mean the victim's family has forgiven him. And there can be forgiveness without pardon.

I suppose I've been interested in Abraham Lincoln for almost as long as I can remember. My first Lincoln book was the Classics Illustrated comic book version of the life of Lincoln, and with that, I was hooked.