The history of Scots law traces the development of Scots law from its early beginnings as a number of different custom systems among Scotland's early cultures to its modern role as one of the three legal jurisdictions of the United Kingdom. The various historic sources of Scots law, including custom, feudal law, canon law, Roman law and English law have created a hybrid or mixed legal system, which shares elements with English law and Northern Irish law but also has its own unique legal institutions and sources.