A point of clarification here.
Peter's statement is correct and accurate. What Peter is referring to is that English Law and hence American, Australian, Canadian
, Kiwi, etc. law derives from the Magna Carta which, amongst other things guaranteed one's right to arms, trial by one's peers, etc. The Magna Carta is a cornerstone of the laws of almost all English speaking countries.
Magna Carta: Cornerstone of the U.S. Constitution | EDSITEment