"Cruel, merciful; peace-loving, a fighter; despising Negroes and letting them fight and vote; protecting slavery and freeing slaves." Abraham Lincoln was, W. E. B. Du Bois declared, "big enough to be inconsistent." Big enough, indeed, for every generation to have its own Lincoln--unifier or emancipator, egalitarian or racist. In an effort to reconcile these views, and to offer a more complex and nuanced account of a figure so central to American...