Answer:
Lincoln referred to the principles of human equality
Explanation:
In the Gettysburg speech, the president addressed the principles of equality proclaimed once in the Declaration of Independence, and the civil War was appreciated in a new way: As a struggle for the preservation of the United States, which would be accompanied by "a New Birth of Freedom " to grant true equality to all citizens and to preserve the Union of States as a single state in which all citizens will be equal.
