Business, to be successful, must be based on science, for demand and supply are matters of mathematics, not guesswork.
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About Elbert Hubbard
Elbert Hubbard was a 19th-century American writer and philosopher. Elbert Green Hubbard was an American writer, publisher, artist, and philosopher. Raised in Hudson, Illinois, he had early success as a traveling salesman for the Larkin Soap Company. Read more on Wikipedia →