<span>1) educated people of the Middle Ages did NOT think (nor did the Church teach) that the earth was flat!! They had known otherwise for over two millennia! (Opposition to Columbus's plans was based on the belief that the world was LARGER than he thought, and the voyage too far to make safely. In fact, his CRITICS were correct about the earth's size!)
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World War also started after archduke Francis Ferdinand got assassinated.
Manifest Destiny summary: In the 19th century US, Manifest Destiny was a belief that was widely held that the destiny of American settlers was to expand and move across the continent to spread their traditions and their institutions, while at the same time enlightening more primitive nations. And the American settlers of the time considered Indians and Hispanics to be inferior and therefore deserving of cultivation. The settlers considered the United States to be the best possible way to organize a country so they felt the need to remake the world in the image of their own country.
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