All of the following powers are shared by both the Federal and States governments except:
a. Power to tax
b. Power to borrow money
c. Power to take Property for Public Purposes (Eminent Domain)
d. Power to regulate intrastate commerce

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.

well to answer ur question to be completly honest

answer; collectivism;