the legal system of the united states is based on the english common law
Law of the United States At both the federal and state levels, with the exception of the state of Louisiana, the law of the United States is largely derived from the common law system of English law, which was in force at the time of the American Revolutionary War.[14][15] However, American law has diverged greatly from its English ancestor both in terms of substance and procedure,[16] and has incorporated a number of civil law innovations.
Constitution of the United Kingdom The United Kingdom does not have one specific constitutional document named as such. Instead, the so-called constitution of the United Kingdom, or British constitution, is a sum of laws and principles that make up the country's body politic. This is sometimes referred to as an "unwritten" or uncodified constitution.[1][2] The British constitution primarily draws from four sources: statute law (laws passed by the legislature), common law (laws established through court judgments), parliamentary conventions, and works of authority.[1] Similar to an entirely written constitution, this sum also concerns both the relationship between the individual and the state and the functioning of the legislature, the executive, and the judiciary.