What does the legal doctrine of stare decisis ensure?

The legal doctrine of stare decisis, which translates from Latin as "to stand by things decided," ensures consistency and stability in legal decisions. This principle compels courts to follow the precedents set by previous decisions when ruling on similar cases. By adhering to established legal precedents, courts promote a predictable legal environment that helps individuals and businesses understand their rights and obligations. This consistency enhances fairness in the judicial system, as it requires similar cases to be treated alike, fostering trust in the legal process.

In contrast, the other options highlight elements that are not aligned with the principle of stare decisis. For instance, the idea that courts can change laws at their discretion does not reflect the binding nature of past rulings that stare decisis establishes. Similarly, the notion that all cases are treated differently contradicts the very aim of this legal doctrine, which strives for uniformity. Lastly, the confidentiality of court opinions does not pertain to stare decisis, as this doctrine is fundamentally about the accessibility and reliance on judicial decisions rather than their secrecy.