This chapter examines debates about manners and civility in the first half of the twentieth century. Tensions between aristocrats and Western-educated civil and military government officials culminated in the overthrow of the absolute monarchy in 1932. This period saw an outpouring of works about politeness and manners targeting the bureaucratic elite and the emerging middle class. Thai statesmen devoted a remarkable amount of attention to what they perceived to be the problem of manners and morals. Leading political figures on all sides of politics wrote about the subject. The model of ideal conduct that the absolute monarchy had developed for bureaucrats in the late nineteenth and early twentieth centuries, a hybrid between the palace courtier and the English gentleman, began to be challenged by new and more diverse conceptualizations of social relations, pushed by supporters of a more progressive political order. Yet the new rules for how to behave were resisted by supporters of the old aristocratic order. Some of them attempted to salvage what was left of the old courtly ways in books and novels and their own etiquette manuals.