Lincoln's argument was against slavery expansion in the country. Also, through his philosophy, we can see a democratic vision, because Lincoln was able to express people's feeling and thoughts, that's why he was supported even being an ''unknown politician''. People saw in him something different and sincere, due to his acts. A man of his word, we can say.
Emphasizing changes that have taken place in America strengthen Lincoln's argument is that he was able to present what he wanted to say to the American people. It is being supported by his conviction of the words as he emphasized the parts of his speech through his act. It is more convincing and powerful
