"Walden. yesterday I cam here to live." That entry from the journal of Henry David Thoreau, and the intellectual journey it began, would by themselves be enough to place Thoreau in the American pantheon. His attempt to "live deliberately" in a small woods at the edge of his hometown of Concord has been a touchstone for individualists and seekers since the publication of Walden in 1854. But there was much more to Thoreau than his brief experiment in...