In 1909, in the great state of Illinois, school teachers one February day were directed to spend at least half the school day in public exercises, patriotic music, and recitations of sayings, verses, and speeches to mark the centennial birthday of a great hero. At the end of it all, they were to have their students face in the direction of Springfield and chant in unison the following: “A blend of mirth and sadness, smiles and tears; “A quaint knight errant of the pioneers; “A homely hero, born of star and sod; “A Peasant Prince, a masterpiece of God.” Who...