Answer:
O to protect the rights of people in democratic countries. O to promote democracy around the world. O to bring about changes in government in Communist countries.
Tariff is a tax on imported goods embargo is a quantitative restriction on imported goods
I am guessing you are meaning after the Civil War, which if this is the case, it is known as Reconstruction.
Our world would most likely be filled with art and culture more than now. Art, science and such were a big part of Roman culture.