Precedent and Stare Decisis

Courts decide cases by looking at how similar cases were decided before—the doctrine of stare decisis ('to stand by things decided'). This creates a system where past rulings constrain future decisions, building a body of predictable law without requiring legislators to anticipate every situation. The mechanism is layered: lower courts must follow higher courts' rulings within their jurisdiction, and courts generally follow their own prior decisions unless compelling reasons exist to overturn them. Precedent makes law somewhat predictable but also path-dependent—early rulings in a new domain (like internet law or AI liability) disproportionately shape all future rulings, creating enormous stakes around first cases.

When to use it

When making a decision that will clearly be referenced for future similar decisions. When you want to understand why an institution behaves in seemingly irrational ways (the answer is often an old precedent). When entering a new domain where no precedents exist yet and your actions will define the rules.

How it can help

Think of precedent as institutional path dependence. In organizations, early decisions about culture, compensation, or conflict resolution become informal precedents that constrain future choices. If you let one employee work remotely, you've set a precedent others will invoke. Use this awareness strategically: set good precedents early, and when you must deviate from a bad precedent, explicitly acknowledge the change and explain why. In negotiations, recognize that the first deal you strike with a client becomes the template for all future deals. Be intentional about what you're establishing as 'normal.'