As the “forgotten principle” of the French Revolution, one that otherwise remained in Latin American political vocabulary and praxis, this chapter argues that the idea of fraternity has a political dimension. Firstly, the piece analyzes some of the general features of political fraternity. Then, it addresses main objections to the concept. After that, the chapter points out the historical presence of political fraternity in the Latin American context. Finally, it compares the concepts of diversity, conviviality, and fraternity, stressing some common characteristics as well as criticisms. The chapter ends arguing the importance of deepening the study of concepts such as conviviality and fraternity in order to recognize and apply innovative ideas about “living together with differences.”