You could get a big surprise if you think that the romans get stagnated about technology. https://en.wikipedia.org/wiki/Roman_technology#Technologies_developed

You could get a big surprise if you think that the romans get stagnated about technology. https://en.wikipedia.org/wiki/Roman_technology#Technologies_developed_or_invented_by_the_Romans https://en.wikipedia.org/wiki/Roman_technology#Technologies_... https://en.wikipedia.org/wiki/Barbegal_aqueduct_and_mill https://en.wikipedia.org/wiki/Barbegal_aqueduct_and_mill http://www.waterhistory.org/histories/barbegal/ http://www.waterhistory.org/histories/barbegal/ What pushed or stagnated tech development not was slavery. What push us quickly since the modern age, was the free movement of ideas and knowledge (thanks to the printing press and paper making the books affordable) and the scientific method.