The spread of common law in the wor

The spread of common law in the world is due both to the once widespread influence of Britain in the world and the growth of its former colony, the United States. Although judges in one common law country cannot directly support their decisions by cases from another, it is permissible for a judge to note such evidence in giving an explanation. Nevertheless, political divergence has produced legal divergence from England. Unified federal law is only a small part of American law. Most of it is produced by individual states and reflects various traditions. The state of Louisiana, for example, has a Roman civil form of law which derives from its days as a French colony. California has a case law tradition, but its laws are codified as extensively as many Continental systems. Quebec is an island of French law in the Canadian sea of case law. In India, English common law has been codified and adopted alongside a Hindu tradition of law. Sri Lanka has inherited a criminal code from the Russian law introduced by the Dutch, and an uncodified civil law introduced by the British.