An evolutionary approach on the study of the funerary systems in Late Prehistory allows recognizing diverse contexts of social crises in the north of Iberia. The analysis of the radio-chronological data that we have compiled indicates five phases of use—with the newness of identifying two different cycles during the Late Neolithic—and of subsequent ‘abandonment’ in the megaliths; this is reduced to two phases in the case of the sepulchral caves. We interpret the radio-chronological results through an examination of the material culture present in the graves and dynamics of the megalithic architecture. In addition, we contrast our results with different approaches, carrying out a complementary multidisciplinary approach. In this regard, we found that megalithism served as a vehicle for responding to the different crisis and changes faced by increasingly complex and unequal human groups.