Few figures hold as mythic a place in America's historical consciousness as John Brown. A fervent abolitionist, his New England reserve tempered by a childhood on the Ohio frontier, Brown advocated arming fugitive slaves to fight for their freedom, an idea that impressed Frederick Douglass, Ralph Waldo Emerson, and Henry David Thoreau. In 1855, answering the call of his five sons to join them in the desperate struggle for freedom in the new territories,...