Answer:
The incredible coincidence that surround the appearance of the messenger from Corinth and the shepherd was that he was both the messanger, and once he had been the shepard that found a baby on the woods near Thebes who he had helped, that baby happened to be Oedipus.
Explanation:
The messanger that was coming to tell Oedipus that his father Podipus was dead, was the same shepard that years ago found Oedipus abandoned. It was an incredible coincidence that he was giving a message to a man, that years ago he met as a baby.
The answer for this question is: <span>the election of Abraham Lincoln as President
Abaraham Lincoln was always known as someone that really see slavery as something that undermines human's value.
Not long after elected as president, Abraham Lincoln made several policies that make it harder for the southern states to keep their slaves, which led to the first secession.</span>
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