Genocide is intentional action to destroy a people (usually defined as an ethnic, national, racial, or religious group) in whole or in part. The hybrid word "genocide" is a combination of the Greek word génos ("race, people") and the Latin suffix -cide ("act of killing"). The United Nations Genocide Convention, which was established in 1948, defines genocide as "acts committed with intent to destroy, in whole or in part, a national, ethnic, racial or religious group".
The term genocide was coined by Raphael Lemkin in his 1944 book Axis Rule in Occupied Europe; it has been applied to the Holocaust, the Armenian genocide and many other mass killings including the genocide of indigenous peoples in the Americas, the Greek genocide, the Indonesian killings of 1965–66, the Assyrian genocide, the Serbian genocide, the Holodomor, the 1971 Bangladesh genocide, the Cambodian genocide, the Guatemalan genocide, and, more recently, the Bosnian genocide, the Kurdish genocide, the Darfur genocide, and the Rwandan genocide.
According to a Political Instability Task Force estimate that between 1956 and 2016 a total of forty-three genocides took place, causing the death of about 50 million people. The UNHCR estimated that a further 50 million had been displaced by such episodes of violence up to 2008.
Before 1944, various terms, including "massacre" and "crimes against humanity" were used to describe intentional, systematic killings, and in 1941, Winston Churchill, when describing the German invasion of the Soviet Union, spoke of "a crime without a name".