Iago as a Demon

I know I just mentioned this theory in class but I have to write it down...

I really think the reason that Shakespeare did not kill Iago because he is trying to portray Iago as some heinous devil figure or demon of some sort. Just not human. All of Shakespeare's plays are very human in foundation. They deal with human themes and conflicts involving the human mind and tendency. His tragedies all end with killings and some sort of closure, however brutal. Also, the fantasy characters in his plays are always around and never die. Macbeth is a good example. The three witches in Macbeth cause so much pain and turmoil in the kingdom, and Macbeth even dies. But the witches just disappear, they suffer no consequences for their actions. I think Iago could be some sort of male version of the witches. The text tells the audience that he will be tortured and killed, but that revenge does not happen on stage and we never know for sure.

Furthermore, Iago has no motivation for his manipulation of Othello and other characters within the plot. He does it out of pure malice. He doesn't seem to have any emotion at all for that matter and cares about nothing except his plan. He seems to come into the play with the intention of messing with Othello and leaves the play without any regrets or visible consequences. Acting as a catalyst all the while.

I envision him as a character with no ending or beginning, sort of just a continual beam of evil minded emotion. The other characters have specific start and stop points in comparison. Othello and Desdemona, for example, are clearly grounded in their setting. They have not always been married or been in love. They have other obligations and things to tend to and their streak ends when each dies. It's very straightforward, a very human time line. Iago seems to have no other agenda other than causing mayhem. Sure, he has his wife, Emelia, but he eventually kills her and even she recognized his non trustworthy ways. I can point out quotes too for hard evidence, but I think this is enough for one post. Anyway, Iago is a purely evil character.