The consolidation of the democratic state of law, based on a liberal and individualist doctrine, had made clear that the liberal ideas about freedom and equality were not enough to really assure the fundamental rights for everybody. This perception has begun a critical moment. The democratic state standard was considered too individualistic and was seen as an encouragement to self-centered interests. At this point, the idea of collective rights has emerged. Though, I intend to discuss the concept of collective rights, considering the structure of the liberal democratic state of law. I will analyze: the origin of the criticism about the liberal theory´s individualistic basis; the idea of collective identities; the relation between individual rights and collective rights and the different comprehensions about the collective rights and the democratic state of law, in a liberalist view. Finally, I intend to look for means to make collective rights compatible with the democratic state of law, in a way that makes possible for people to achieve happiness and make also possible to keep valid the modern theory of rights, based on an individualistic and subjectivist model.