How did William the Conqueror’s 1066 A. D. invasion of England further the concept of law in ways still practiced today? American law is based in part on English legal structures that combined William’s writs, Roman law, custom and practice with England’s common law.
William was successful in establishing his royal authority because he was able to use many different codes in his jurisdictions.
William was the first king to show the relevance of precedent.
William furthered American law by addressing every crime with writs that later became warrants in American law.