The answer to your question is the title of the poem.
C. Poe wanted to challenge social conformity and change the outlook on how people reacted to certain events. If you look a lot of his writing was dark and often gruesome. Do to this he was able to change the way writers transitioned their work, he also help classify the first detective workings as well as begin the science fiction genre.
Because the organization depends on how you will be making the essay because if you did order of importance than your central idea would most likely be developed in the beginning, but if it was like order of like same and difference then the central idea would be tough to put in you would have to put the central idea at the end to clarify why you did the order of same and difference.
