First, however, there are two common misconceptions to dispel. Your thesis is
not an introduction. An introductory paragraph starts with a "hook," which leads into the thesis. You do need an introduction as well as a thesis. Second, a simple restatement of your thesis is not a conclusion. To create that satisfying sense of finality in your conclusion, you must revisit the stuff of your introduction. If you start with a story, return to the story. If you start with a definition, return to the definition, even if only to contradict it.