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.
The first sentence of the concluding paragraph uses the principal words from the quotations from each paragraph of the body of the paper. This summarizes those three paragraphs. The second and third sentences provide observations which can also be considered a summary, not only of the content of the paper, but also offers personal opinion which was logically drawn as the result of this study. The last sentence returns to the Edgar Allan Poe-Stephen King relationship that began this paper. This sentence also provides a "wrap-up" and gives the paper a sense of finality.