Some delegates were so afraid of tyranny and infringement upon people's rights they did not want a president.These would have been the democrat-republicans. The most famous democrat-repubican was Thomas Jefferson. James Monroe and eventually James Madison were democrat-republicans as well.
The theme in Creon's word is pride. He creates a law believing that it is a divine will. It is his way to display the punishable pride that any man is no match to the divine right. Then he realizes his mistakes and in return, grieves the loss of his family.
It enabled Abraham Lincoln to issue the Emancipation Proclamation, by giving the Union enough confidence (The battle had forced the Confederate troops to withdraw, making it technically a Union victory) to change the focus of the war from bringing the wayward states of the South back into the fold, into a war to destroy slavery in America. One major consequence of the Emancipation Proclamation was that the European powers that were interested in helping the CSA were discouraged from interfering, given that their populations had a severe distaste of slavery, and a war to support slavery would not be taken well by their people.
A because he was very optimistic.