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Re:Why They Lost The Wheel (1973) by hga on Saturday February 28, 2015 @11:59AM (#9124224)
Jerry Pournelle frequently comments that the invention of the horse collar (https://en.wikipedia.org/wiki/Horse_collar) was one of the most consequential ones in history. Here we have a similar move from oxen to something more efficient.
Re:Why They Lost The Wheel (1973) by scentoni on Saturday February 28, 2015 @03:52PM (#9125009)
That reminds me that Egyptians and Romans rode in chariots rather than on horseback because they didn't have stirrups: http://en.wikipedia.org/wiki/Stirrup
Re:Why They Lost The Wheel (1973) by rpenm on Saturday February 28, 2015 @05:15PM (#9125246)
The Roman legions used saddled cavalry. Chariots were only really used for racing. But yes, Romans rode without stirrups.