Actually, many who fought for the South maintained they were fighting for "States Rights" as guaranteed by the U.S. Constitution. Slavery, while an unsavory fact of life in the South, also existed in some northern states as well as the new entrant border states. The Civil War (500,000 casualties so how "civil" was it?) came to be seen as a fight against slavery, since that was an easier "sell" in the North.
While Lincoln was certainly compassionate about suffering of many kinds, he was extremely passionate about preserving the Union.
He was also a man of his times. His writings an actions as a young lawyer clearly underline what we would call today, racisim. But that attitude was shared by nearly everyone in one way or another.
An excerpt from his debate with Fredrick Douglas:
"�I have no purpose directly or indirectly to interfere with the institution of slavery in the states where it exists. I believe I have no lawful right to do so, and I have no inclination to do so."
"... �I will say then that I am not, nor ever have been, in favor of bringing about in any way the social and political equality of the white and black races; I am not nor ever have been in favor of making voters or jurors of Negroes, nor of qualifying them to hold office, nor to intermarry with white people.�
Contd.