Compare the international metric system with the one used in your own country. Which one do you prefer ? Do you think there should be one system for the whole world to use? Why is it important to know both metric systems?

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

because the early people found out about it.