The U.S is a republic that has a bicameral to divide powers between the governor and the legislature.
The correct answer is ethical egoism. It is a school of taught that states that people should be egoistic and look after themselves. The idea is that if everyone looks after themselves, then it will create a society where all is well because everyone would be fine. It has to be within ethical boundaries though.
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Massive retaliation, also known as a massive response or massive deterrence, is a military doctrine and nuclear strategy in which a state commits itself to retaliate in much greater force in the event of an attack.
They came to Jamestown to start a colony for England, search for gold, and escape religious persecution.
Things would still be produced by hand. We would not have factories polluting at such a high rate. Production would be slower.