Starting from a theoretical and legal framework of the controversial concept of the right to peace, and highlighting how, despite the solemn proclamations and commitments that firmly root the human right to peace in international instruments (and particularly in the 2016 UN Declaration on the Right to Peace), from a legal point of view, the human right to peace remains essentially undefined in its concrete content and, above all, poorly implemented at the global level, this paper examines the role that religions can play in the construction and effective implementation of the right to peace. This assessment must take into account not only the teachings of religions on peace, but also the position, not always straightforward and in some cases ambiguous, of certain religious actors and leaders on the issue of violence and the legitimacy of the use of force as a means of conflict resolution, as well as the role that religions still play today as a cause of conflict around the world. Finally, it discusses how the resurgent "cult of war" that is spreading throughout the world, which in some cases directly or indirectly involves certain religious actors, may prove to be an obstacle to the full recognition of the human right to peace.