Ask yourself what you are trying to communicate in the paper. The body of your essay will essentially explain the answer to your question. Don't necessarily write the question in the introduction; instead, just contemplate what the question might be.
Create an introduction that looks at the big picture of your essay. Though the introduction needs to be broad enough to cover the scope of your essay, it should contain key words that are specific to your title. For example, instead of writing, "Government-sanctioned execution is... ," say, "Capital punishment is... ."
Write the body of your essay first and then write the introduction. You will have a better understanding of your topic once you have completed research and writing.
Open with an interesting fact backed by a credible source. This will speak to the credibility of your essay while grabbing the reader's attention.
Be as clear and concise as possible. Deliver the introduction with confidence and language that will captivate your reader. Use active voice and ensure each line flows seamlessly to the next.