• publisher: Unpublished
• date: 12/10/2014 5:45:34 AM
• originalFile: 252-the-mainspring-of-human-progress-back-cover.pdf
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• docReferenceNumber: 252
• correspondenceFrom:
• author: Henry Grady Weaver
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  The Mainspring of Human Progress 
  HENRY GRADY WEAVER 
  FOR SIX THOUSAND YEARS PEOPLE DIED OF HUNGER. 
  WHY DON'T WE? 
  This is the basic question dealt with in MAINSPRING. 
  But the attempt to find the answer leads into a wide range 
  of subjects, such as: 
  • What is the greatest of all our modern inventions? 
  • Who invented zero (O) and why? 
  • Just what is the difference between a republic and 
  a democracy? 
  • What simple invention contributed most to our 
  national wealth? 
  • What w...

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252-The Mainspring of Human Progress Back Cover.pdf