Fatalism and Rationality are two separate valuable attributes. In Rationalism and rationality, the active and creative role of human is emphasized, meaning ignorance aversion, imagination aversion, illusion removal and superstition removal. This concept is the opposite of the concept of fatalism in which human has the minimum activity and the emphasis is very much on the role of trans-physics in humans’ destinies. The purpose of this article is to investigate the limits of rationality and fatalism in oral and folk (colloquial) literature of Kurdish people. In fact, the study attempts to reveal that to what extent Rationalism and fatalism exist in oral culture of Kurds through analyzing their oral literature. To achieve the mentioned objective, qualitative research method and thematic technique have been employed in the study and it seeks to reach the principal categories using de coding the data collected from interview with the selected samples. The selected samples have been restricted to theoretical saturation and time interview in order not to obtain new data from interviewing. The result of the study show the theme of Kurdish oral literature includes both rationalism and fatalism which determines that many sociological schools’ views and theories such as the theory of modernization which believes undeveloped societies won’t develop unless they get rid of the negative concepts and gravitate towards the positive concepts of rationality and wisdom are not true. Manuscript profile