The Declaration of Independence kicked off the American revolution by forcing to cut ties between The English North American Colonies and England herself. In the document it conveys natural rights and equality among men. Which at the time were highly progressive ideals. The founding fathers were considered radicals due to the revolution they started. This also inspired what would later be the French Revolution, as the people of France demanded these same natural rights. The Declaration of Independence set a movement of political fervor in Europe and other colonies.
The launch of Sputnik in 1957 was important because most in the U.S. had not thought the Soviets were capable of producing satellite technology. This was also important because it was start of the Space Race between Russia and the United States.
I believe the answer is: 2. but should be abolished.
The abolitionists see slavery as inhumane and should be stopped. This view become even more popular after the industrial revolution that come from western Europe, which eliminate the needs of using slave labour since it can be replaced with machines.