What was the benefit of common law over local law codes?

Common law provided a unified legal framework that established consistent legal principles across different jurisdictions, promoting fairness and predictability in legal outcomes. Unlike local law codes, which could vary significantly from one area to another, common law allowed for the development of legal precedents through judicial decisions, enabling a more adaptable and evolving legal system. This uniformity helped facilitate commerce and communication across regions, as individuals and businesses could rely on a common set of legal standards.