Three social changes in european history that were especially important to the development of sociology included

The answers to your question are,

A New Industrial Economy,  The Growth of Cities, and Political Change!

-Mabel <3

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.

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;