Economic: The south lost much of its agricultural land due to it being destroyed in battles, and the loss of slavery meant serious economic downfall because their industry relied heavily on slave labour. However, the North was more industrialised, so it benefitted from the added railroad and the manufacture of wartime products.
Social: 2% of the population was killed; many lost loved ones and family members. Also, racial prejudice resulted in the formation of the KKK by many whites who were angry that African-Americans had been freed-- as well as the Jim Crow laws being enforced
Political: 13th, 14th and 15th amendments passed in the constitution
Ecology is the study between humans and their physical environments
Best answer for filling in that blank: EQUALITY
Freedom means that individuals have liberty to have their own beliefs, their own lives, without being controlled or dominated by the government or by others in the country who have different beliefs.
Equality means each individual is to have the same rights within the country, so that there is equal justice for all citizens. Every person is to be treated the same way under the laws of the land.
Note that the French Revolution also took up these themes of liberty and equality, to which they added also "fraternity" (brotherhood) as a third ideal for the government and nation they wished to form.
Democrats wants gun control while republicans don't