A life as full as Franklin’s could not be captured in a phrase—or a volume. Yet if a few words had to suffice, a few words that summarized his legacy to the America he played such a central role in creating—and that, not incidentally, illustrated his wry, aphoristic style—they were those he uttered upon leaving the final session of the Constitutional Convention. A matron of Philadelphia demanded to know, after four months’ secrecy, what he and the other delegates had produced. “A republic,” he answered, “if you can keep it.”

