Why begin a D&I strategy?

At the start of your document, clearly state why you believe there is a need for a D&I strategy at your company. Where did the idea come from? Are you revising a pre-existing policy? Is this plan reactive (in response to an event) or proactive (a pre-emptive step to ensure your team starts off on a strong foot)? Or is this plan based on a data collection exercise, either of the diversity in the company, or the pay gap between groups?