In this study, the light is shaded upon the emergence of international crimes. It also peruses the international concerns of these crimes and upon the done work by the international community as part of the suffering alleviating endeavor that engulfed the human being because of many ugly crimes against the populations. This issue particularly concerns the first and the second world wars and the following civil and ethnic crimes. It also resulted from the deadly and still-live suffering discriminations policies. in addition to, the civil wars that committed in the name of religions against the innocent citizens in every corner and place in this simple world. In this article, we innocent citizens in every corner and place in this simple world . in this article, we work on historical peruse regarding the core of the crime and displaying some attempts, conferences and agreements which led to establish international courts to put into try the war's criminals as it experienced in the time of the first world war and other courts established after the end of the second world war .