The Renaissance started in Italy due to it being the previous Roman empire, the movement was the revival of its ideals and artistry. Other reasons are due to trading (cultural exchange), scholarly activity, and city-states under the rule of powerful families such as the Aragons of Naples and the Sforzas of Milan.
No, it is false that Imperialism was the name given to the idea that Americans should expand across the nation to the Pacific Coast, since what you're referring to was known as "Manifest Destiny".
It took two men to wrestle Rome<span> back from chaos and turn a </span>republic<span> into an</span>empire<span>. In the first century BC, </span>Rome<span> was a </span>republic<span>. Power lay in the hands of the Senate, elected by </span>Roman<span> citizens. But the senators were fighting for power between themselves.</span>
<span>Having a large ocean on each side of the country made early Americans consider isolationist policies in regards to their relations with other nations. The oceans have served as a natural defense against others for centuries.</span>