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If I were required to guess off-hand, and without collusion with higher minds, what is the bottom cause of the amazing material and intellectual advancement of the last fifty years, I should guess that it was the modern-born and previously non-existent disposition on the part of men to believe that a new idea can have value.

Mark Twain (2017). “MARK TWAIN Ultimate Collection: 370+ Titles in One Volume (Illustrated): The Adventures of Tom Sawyer & Huckleberry Finn, The Prince and the Pauper, The £1,000,000 Bank Note, A Horse’s Tale, Yankee in King Arthur's Court, The Innocents Abroad, Life on the Mississippi…”, p.3737, e-artnow
If I were required to guess off-hand, and without collusion with higher minds, what is the bottom cause of the amazing material and intellectual advancement of the last fifty years, I should guess that it was the