Contextualizing Genocide & Mass Atrocities
The term “genocide” was coined in 1944 by the Polish-Jewish lawyer Raphael Lemkin. While he was a student at the University of Lviv in present-day Ukraine in 1921, he learned about the Armenian genocide during discussions surrounding the assassination of one of its principal orchestrators: Talaat Pasha.
Lemkin was struck by the fact that the young assassin, Soghomon Tehlirian, was being tried for the murder of one individual, while Talaat Pasha was never held accountable for the murder of over a million people.
Having lost 46 members of his own family in the Holocaust, Lemkin sought to prevent similar mass killings. He first gave a name to the deliberate destruction of a group of people, and then he worked to establish it as a crime under international law. Lemkin collaborated closely with the newly formed United Nations (UN) to conceive and draft the Convention on the Prevention and Punishment of the Crime of Genocide (Genocide Convention).
After World War II, the Genocide Convention shaped efforts to hold Germany accountable for its murder and brutalization of millions of people during the Holocaust. From November 1945 to October 1946, the Allies prosecuted 199 Nazi military leaders, camp officers, doctors, propagandists, and business leaders during the 13 Nuremberg Trials. In total, the tribunals convicted 161 individuals and sentenced 37 to death.
Raphael Lemkin’s advocacy led the newly formed United Nations (UN) to make the prevention of genocide a priority. While Lemkin defined genocide broadly, including the destruction of a group’s cultural foundations, the definition was narrowed during UN negotiations.
On December 9, 1948, the UN formally recognized genocide as a crime under international law by adopting the Convention on the Prevention and Punishment of the Crime of Genocide—the first international treaty approved by the UN. According to the Genocide Convention:
Genocide means any of the following acts committed “with the intent to destroy, in whole or in part, a national, ethnical, racial, or religious group”, including:
- Killing members of the group;
- Causing serious bodily or mental harm to members of the group;
- Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part;
- Imposing measures intended to prevent births within the group;
- Forcibly transferring children of the group to another group.
Genocide is one of three atrocity crimes recognized under international law, alongside crimes against humanity and war crimes.
Crimes against humanity involve widespread or systematic attacks against civilian populations, including persecution, enslavement, apartheid, sexual violence, and enforced disappearance.
War crimes are violations of international humanitarian law during armed conflict. They generally fall into three categories: attacks on protected persons (e.g., civilians, medical personnel, journalists), attacks on protected property (e.g., hospitals, schools, cultural heritage sites), and attacks that use prohibited weapons (e.g., chemical or biological weapons, land mines, cluster munitions).
These three atrocity crimes are equally serious. They are considered peremptory norms, meaning there is never a legal justification for committing them, even in response to another atrocity.
A fourth kind of mass atrocity—ethnic cleansing—is not defined as a separate crime under international law. However, a 1993 UN Commission of Experts described it as a deliberate effort to violently remove a population from a territory. Such acts can constitute war crimes, crimes against humanity, or genocide. Understanding these distinctions is critical for recognizing the scale of harm and the legal obligations of the global community.