It’s not strange anymore, when for most of people a post on the internet can have much more significance than what’s happening in the real world. We evaluate people based on their Facebook and Instagram photos and videos. And we’re often wrong in our judgments.
Doing a thorough literature review is crucial when you write about research at any level. It is basic homework that should be done vigilantly, and a given fact in all research papers. By providing one - usually stated in your introduction ahead of your thesis statement - you are telling your reader that you have not overlooked the basics of research. It does not only survey what research has been done in the past on your topic, but it also evaluates, summarizes, compares, and correlates numerous books, research articles, and other relevant sources that are directly related to your current research.