Democritus would appear to have been persuaded by arguments that appropriate to the science of nature. The point will be clear as we proceed. For there is a difficulty in supposing that there is a body, a magnitude, that is everywhere divisible and that this [the complete division] is possible. For what will there be that escapes the division?...

The text shown above was written by Aristoteles, where he doubted the existence of the atom.

Explanation:

Aristoles did not believe in the existence of the atom, he wrote about it in "Generation and Corruption," where he found it impermissible to believe in a structure as small as the atom could be divided, or be the basic structure of matter. For Aristoteles the matter was formed by the mixture of four elements and as he had a strong social influence, his theory about the composition of the matter was accepted for many years, even though it was wrong and disregarding the atom.

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.