Polemology and irenology that have been evolving since the Second World War are relatively unknown. There is much misunderstanding about polemology and irenology and what can be done with research results. The methodological competition between polemology and irenology indicates their differences due to the opposite research subject (war-peace), the system of concepts, and the usefulness of research results. The aim of the article is to present the basic assumptions of irenological and polemological research and to propose a common area of research on peace and armed conflicts. The article presents a thesis about the need to integrate polemological and irenological research. Due to the research problem and the subject of research, a qualitative strategy and appropriate research methods were used in the research process. The obtained research result indicates that it is not justified to conduct research on peace and armed conflicts separately, but as a whole as a study of peace and armed conflicts. The conclusions from the research indicate that the genesis, diagnosis and prognosis of peace and conflict-related processes is justified in the range of long cycles from minus 50 to plus 50 years in relation to the started research process.