This chapter explores the ways Americans understood the Muslim South and its inhabitants. It discusses the construction of “the Moro” that arose from eclectic sources, such as translated Spanish books, North American frontier expansion, imperial readings of Islam, ethnographic study, and the cultivation of regional expertise. It identifies governors, district administrators, missionaries, and businessmen-instrumentalized ideas in structures they created in the South. The chapter reviews the establishment of new laws, modernization of Moros through education, introduction of Western forms of market capitalism, and induction of sedentism that became paramount to the colonial state. It explores the production of racial and territorial knowledge on the Philippines' southern frontier.