Which term best describes a body of law based on custom and general principles, operating through the use of individual cases as precedents for future decisions?

The term that best describes a body of law based on custom and general principles, operating through the use of individual cases as precedents for future decisions would be common law. It  is a rule set in a prior legal case that is either binding on, or persuasive, for a court, or other tribunal, when deciding subsequent cases with similar issues or facts.