A vital and underappreciated dimension of social interaction is the way individuals justify their actions to others, instinctively drawing on their experience to appeal to principles they hope will command respect. Individuals, however, often misread situations, and many disagreements can be explained by people appealing, knowingly and unknowingly, to different principles. On Justification is the first English translation of Luc Boltanski and Laurent Thevenot's ambitious theoretical examination of these phenomena, a book that has already had a huge impact on French sociology and is...