Final answer:
Stare decisis is the underlying principle behind the principle of following precedent in court cases. It means that judges should use previous court decisions as a guide for future cases. While there is some flexibility, judges are generally expected to rely on precedent when making decisions.
Step-by-step explanation:
The underlying principle behind the principle of stare decisis is that previous court decisions should serve as a guide for future cases. Stare decisis is a Latin term that means 'to stand by the decision.' It requires judges to follow precedent and apply the rule of law contained in earlier cases to the current case. Although there is flexibility and new precedents can be created, judges are generally reluctant to disregard precedent without justification.