TED-EdHow inventions change history (for better and for worse) - Kenneth C. Davis
TV-PG
2012 • E66 17 de out. de 2012 10 minInvented in 1793, the cotton gin changed history for good and bad. By allowing one field hand to do the work of 10, it powered a new industry that brought wealth and power to the American South -- but, tragically, it also multiplied and prolonged the use of slave labor. Kenneth C. Davis lauds innovation, while warning us of unintended consequences.