The amount of detail that you can include in your introduction will depend on your word count.
This is an example of a concise introduction: “Concern about racism in the police has increased since the 1980s.
Take note of these and, as you work through revisions, refine and edit your opening.
If you're struggling with the opening, follow the lead of other writers and skip it for the moment.
It informs readers about the topic and why they should care about it, but also adds enough intrigue to get them to continue to read.
In short, the opening paragraph is your chance to make a great first impression.
Many writers begin with the body and conclusion and come back to the introduction later.
It's a useful, time-efficient approach if you find yourself stuck in those first few words. You can always go back to the beginning or rearrange later, especially if you have an outline completed or general framework informally mapped out.
Use imagery, details, and sensory information to connect with the reader if you can.
The key is to add intrigue along with just enough information so your readers want to find out more.