Passed after the U.S joined WW1, The Espionage Act made a crime any actions of giving information of the U.S. army to enemy countries for their success.
When you impose such policies, you declare how much of a certain currency can enter your country, or can leave your country. If you have different currencies this could harm your economy because it might prevent others from trading with you due to currency differences. If you do things like Europeans, then you can introduce a new policy that abolishes your old currency and adopts a widely used one like the Euro. This might boost your economy because others might invest.
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Rockefeller founded the Standard Oil Company in 1870. He ran it until 1897, and remained its largest shareholder. Rockefeller's wealth soared as kerosene and gasoline grew in importance, and he became the richest person in the country, controlling 90% of all oil in the United States at his peak
The reason is that in a parlimentary system, Parliment has much more power than the other branches. But, in a Semi-Presidental government, The President has an extreme amount of power. He can choose the Prime Minister and can destroy a whole Political Party