Source: SOUTHERN FARM NETWORK, 10/13/17

Mary:  This is Mary Walden with economist MW, welcoming you to the economic perspective.  Today’s program looks at the most important invention of all-time. Mike, I’ve noticed you’ve been reading a new book about the 50 most important inventions.  Of course, we don’t have time to discuss all of them, but I’m curious about one invention.  I want to know which invention the author labeled as the very most important.

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