In Buddhist thought, is an unchanging, peaceful state of mind that allows us freedom from the illusion of individuality and the limitations of the self.

Nirvana.

Explanation:

As the exercise explains, the Nirvana is an unchanging, peaceful state of mind that allows us freedom from the illusion of individuality and the limitations of the self. This state is the goal of Buddhism, which means to blow out, to leave individualitiy, leave the self, and achieve a rebirth, another state of mind.

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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