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.

Until the early 90s, when I was working on a project about the idea of free will in American philosophy. I knew that Lincoln had had something to say about "necessity" and "fatalism," and so I began writing him into the book. In fact, Lincoln took over. I wrote instead 'Abraham Lincoln: Redeemer President,' in 1999, and I've splitting rails with Mr. Lincoln ever since. If there's a twelve-step process for this somewhere, I haven't found it yet.

Remember that Abraham Lincoln was a Whig far longer than he was a Republican. As a whole, the Whigs looked upon banks and corporations as a more efficient means of development; the Jacksonian Democrats thought they were the tools of the devil, but Whigs like Lincoln disagreed. During his presidency, Lincoln favored the re-construction of a national financial system, and his most important 'internal improvement' project was the Pacific railroad.

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.

Corporations did not achieve the scale we normally associate with them until the 1880s; but it's still hard to imagine that Abraham Lincoln would offered much in the way of determined opposition. William Herndon said that they always thanked the Lord when a corporation came knocking at their office door to hire them.

Abraham Lincoln would have been happy to have solved the slavery problem by compensation - in fact, drew up a gradual, compensated emancipation plan as early as November, 1861 - but no slaveholders were willing to go along with it.

The best one-volume biography of Abraham Lincoln is still Benjamin Thomas's 1952 biography. David Donald's 1995 biography is a close second, and close enough that if you can only obtain the Donald rather than the Thomas, your book club will still be doing just fine.