Answer:
One main theme of the Gettysburg Address is the image of the birth and re-birth (i.e., baptism) of the nation and the meaning of this new birth of freedom. Central to Lincoln’s declaration of America reborn is his own new, as-it-were baptismal, teaching on the relation between liberty and equality,...
Step-by-step explanation:
According to History.com, the main idea of the Gettysburg Address is that the sacrifices of those who died on the battlefield of Gettysburg were made to preserve the principles of human equality and self-government as set forth in the Declaration of Independence.