“All that has happened to you,” an English friend wrote Benjamin Franklin, “is also connected with the detail of the manners and situation of a rising people; and in this respect I do not think that the writings of Caesar and Tacitus can be more interesting to a true judge of human nature and society.” Indeed, the story of Franklin's life has mythic sweep and significance. The son of a soap boiler who stood before kings, a runaway apprentice printer who became minister plenipotentiary, Franklin had a career of constant change and discontinuity. His mobility—intellectual, geographical, social—would have staggered a less resilient man.