This article offers some theoretical constructs that allow the elaboration of a deeper understanding of Fraternity, Law and Transnationality. It seeks, through its approach to these three issues, to encourage the study of Fraternity, so that it is possible to identify the same logic at the roots of both Politics and Law. In this way it hopes to contribute to the creation of a new juridical culture that, by guaranteeing fundamental human rights, favours developments that truly respond to the interests of society.