Examples include the Jewish Halakha and Islamic Sharia—both of which translate as the “path to follow”—while Christian canon law also survives in some church communities. Often the implication of religion for law is unalterability, because the word of God cannot be amended or legislated against by judges or governments. However, a thorough and detailed legal system generally requires human elaboration.
In most countries judges may only interpret the constitution and all other laws. But in common law countries, where matters are not constitutional, the judiciary may also create law under the doctrine of precedent. The UK, Finland and New Zealand assert the ideal of parliamentary sovereignty, whereby the unelected judiciary may not overturn law passed by a democratic legislature.
- As one legal historian wrote, “Justinian consciously looked back to the golden age of Roman law and aimed to restore it to the peak it had reached three centuries before.” The