What is the main idea of Abraham Lincoln's a fragment on slavery?

In "A Fragment on Slavery," Abraham Lincoln expresses his moral opposition to slavery, emphasizing the inherent injustice of denying individuals their freedom. He reflects on the moral implications of slavery and the importance of human rights, suggesting that a nation cannot endure half free and half slave. Lincoln's writing illustrates his belief in the fundamental equality of all people and foreshadows his commitment to the abolition of slavery as a necessary step towards a just society.