Lincoln is said to have summed up the importance of keeping the border states ... Virginia, where they had been put to work on behalf of the Confederacy, and ... of the United States, the few actual attempts at colonization during the Civil War failed. ... In principle, Lincoln approved of emancipation as a war measure.
The Roman philosophy of stoicism promoted "self-control," since it was thought that if a person allowed to many emotions to take control this would lead to bad decision-making.