One of the most important theories of international relations is constructivism, which pays attention to both intellectual and cultural factors as well as material factors in the analysis of international relations and foreign policy. But is constructivism just a theory, or can a research method be derived from it? Some constructivists believe that this theory also has research method. Causal mechanisms are one of the research methods in constructivism. Some constructivists accept the causality and causal explanation, but do not offer a mechanical or positivist analysis of it. Rather, they combine it with constructivism and pay attention to a concept of causality that also considers the role of imaginary and invisible components. Thus, constructivism believes in causality, but does not consider the cause to be only material issues (such as force, power, war, etc.), It also considers intellectual, cultural and ideological components (such as tradition, religion, society, etc.) as the cause and considers them involved in explaining the cause