Quite by accident, Roman law and English law share a peculiar dual structure. In both systems, the law (ius civile, Common law) was supported, amended and corrected by a second legal source (ius honorarium, Equity) found in the jurisdiction of particular magistrates. How did this dual structure come into being in Rome and England, and how did it influence legal developments? In Law & Equity: Approaches in Roman law and Common law, seven specialists explore the origins and consequences of this interaction. The history of equity and law is treated by Willem Zwalve, Paul...