The conclusion surveys how in nineteenth-century Mexico, Europe, and regions around the world under European colonial rule, sex work took place in an environment of increasing government intervention, a phase in the history of sexuality that extends into the twenty-first century. The concern about disease control took on a more scientific, sanitary tone in the eighteenth century. This discourse remained critical to sex work law, as it does to the present day. Through prolific regulations, scientific studies, works of literature, and statements made by sex workers themselves, the nineteenth and twentieth centuries saw an enormous increase in the archiving and inscribing of women who sold sex. But their roles remained the same: either pathetic victims (usually of non-whites or non-Christians or other feared populations), lascivious and scandalous disturbers of the peace, or dehumanized and horrific threats to public health. Imperialism and international conceptions of race/gender difference led to increasing government regulation in locations as dispersed as the disappearing Spanish American viceroyalties, extending outwards to Europe, Asia, and Oceania.