عنوان مقاله [English]
Critical Realism is an approach which has two important claims: first, There is a world outside independent of our existence. And second, it is possible to recognize this world as it is. Roy Bhaskar, the most important thinker of critical realism, has emphasized ontology in his theorizing . His initial question is how the world should be, so that our knowledge of it is possible? The answer to which he asks, is the layered ontology, which consists of three experimental, actual and real layers. His approach about the necessities and causal mechanisms and also the concept of absence in his dialectical theory, finds similarities between his ontology and Mulla Sadra's ontology that is based on the principality of existence. Which raises the question of how different these two ontologies are? In this paper, by means of descriptive-analytic method, we compare the ontology of these two thinkers and show that although Bhaskar in the layered ontology exceeds the Sensibility by believing the existence of the necessities and causal mechanisms , but in the Thought system of Sadra, his ontology is in the material layer, and the concept of absence in the ontology of each of these two thinkers, although it is close to the meaning, is different.