Oxford International Encyclopedia of Legal History This link opens in a new windowProvides both historical and contemporary comparisons of the world legal systems, from ancient to modern times (Ancient Greek Law, Ancient Roman Law, Medieval Roman Law, Chinese Law, English Common Law, Islamic Law, United States Law), and the laws of other regions such as Africa, Latin America, and South Asia. Major categories of law explained in detail include private law (contract, tort, civil procedure), public law (statutory, criminal, etc.), and higher or constitutional law.