One way nature helps humans is the trees, they provide oxygen so that we can survive.
According to Lincoln, the South had rebelled, not seceded.
Even though the Confederate States declared their independence from the US and formed their own country/government, Lincoln never formally recognized the Confederacy as an independent nation. This is why her refers to the war as the Civil War, showing that this is a war between two members of the same country.
John Locke, an Enlightenment thinker during the Age of Enlightenment believed in the right to life, liberty, and property. This is very much so incorporated in the Declaration of Independence.
The issue of slavery, economic differences, social differences, stamp act
Carry on (a war or campaign)."it is necessary to destroy their capacity to wage war"