This is perhaps one of Shakespeare's more interesting plays, if you will. In comparison to Macbeth it isn't quite the walk in the park.
I think conceptually it enables the reader to see that characters can influence characters to such a degree that the original traits are masked and changed. Tragedy in this play is definitely a main component - and a great emphasis that perhaps the villain doesn't always find their true defeat. In a way, wasn't the "villain" successful? He lied to everyone and pretty much killed whomever got in his way.
The essay, which follows is an opinion piece that was written for The Globe and Mail. The style is therefore journalistic but aimed at a fairly sophisticated readership. Paragraphs are short, as is normal in a newspaper with its narrow columns, and the tone is more conversational than would be appropriate for a formal essay. Notice the clear statement of the thesis, the concrete illustrations in the body of the essay, and the way the conclusion leads to a more general statement of what is perhaps to come in the future. It is included here both because it is a good example of the essay form and because it explores the kind of problem you will come up against as you try to punctuate your essays correctly.