Denial of atrocities against indigenous peoples are present or historical claims made by public figures, organizations or states that deny any of the multiple atrocities committed against indigenous peoples when academic consensus or present state policy that acknowledges that such crimes occurred. This includes denial of various genocides against indigenous peoples and other crimes against humanity, war crimes, or ethnic cleansing. Denial may be the result of the minority status, cultural distance, small scale or visibility, marginalization, the lack of political, lower economic and social status of Indigenous nations or groups existing within a state.
During the age of colonization, several empires colonized territories which were inhabited by indigenous peoples, and in some cases, the colonizers created new states that included the surviving indigenous peoples within their new political borders. In such processes of expanding their frontier, there were a number of cases of alleged atrocity crimes against Indigenous nations. Given that the dominant or majority group has political and economic power, they may have not addressed these issues on occasions. Scholars and historians have increasingly examined the impact of settler colonialism and internal colonialism in general from the perspective of indigenous peoples. The forced population and territorial controls of indigenous peoples may include internal displacement, forced containment in reservations, forced assimilation, criminalization, dispossession, removal of children, enslavement, captivity, massacres, and reduction of means of subsistence.
In comparison with the legal definition of genocide in the Genocide Convention that has been used in actual litigation, additional scholarly definitions have been used to examine the diverse history of genocide. For example, genocide scholar Israel Charny has proposed a definition of genocide: "Genocide in the generic sense is the mass killing of substantial numbers of human beings, when not in the course of military action against the military forces of an avowed enemy, under conditions of the essential defenselessness and helplessness of the victims.