posted on Aug, 19 2013 @ 11:08 AM
reply to post by 727Sky
OP, I find your thread incrediblly interesting, and certainly congratulate you on your research skills and analytical thinking to bring all that
together from the Roman Empire to the here and now.
It's the story of what dictated the "width" in a way of all transportation, even into space......as horses were the first way humankind had of
transporting themselves faster than their own two legs..... But truly amazing how it all went on from there.