Carl Schurz,
Abraham Lincoln: An Essay
“ I could not feel that, to the best of my ability, I had even tried to preserve the Constitution if, to save slavery, or any minor matter, I should permit the wreck of government, country, and Constitution all together.” In other words, if the salvation of the government, the Constitution, and the Union demanded the destruction of slavery, he felt it to be not only his right, but his sworn duty to destroy it. Its destruction became a necessity of the war for the Union. As the war dragged on and disaster followed disaster, the sense of that necessity steadily grew upon him. ”
