Herbert Hoover believed that the government should not intervene in the affairs of American citizens because they got themselves into their own financial mess so they needed to get themselves out of it. This theory was called rugged individualism.
One of history's first true super powers, the Persian Empire stretched from the borders of India down through Egypt and up to the northern borders of Greece. But Persia's rule as a dominant empire would finally be brought to an end by a brilliant military and political strategist, Alexander the Great.