This chapter presents some brief descriptions of several approaches to determining which policies represent legitimate uses of the power of the state. Nine different ethical criteria have been identified here, but deciding which standard is appropriate is not as easy as picking a number from the list. Prohibition serves as an illustration. The Eighteenth Amendment to the US Constitution provided: 'After one year from the ratification of this article the manufacture, sale, or transportation of intoxicating liquors within, the importation thereof into, or the exportation thereof from the United States and all territory subject to the jurisdiction thereof for beverage purposes is hereby prohibited'. That amendment was passed on December 3, 1917, with all of the appropriate legal and constitutional procedures for amending the Constitution having been properly observed. The chapter concludes with some thoughts about how we can make sense of these disparate approaches to legitimacy.