Today when most Americans think of the Great Depression, they imagine desperate hoboes riding the rails in search of work, unemployed men selling pencils to indifferent crowds, bootleggers hustling illegal booze to secrecy-shrouded speakeasies, FDR smiling, or Judy Garland skipping along the yellow brick road. Hard times have become an abstraction. But there was a time when economic suffering was real, when hunger stalked the land, and Americans...