The English-language term "genocide" did not exist before 1944. It is a very specific word, referring to violent crimes committed against groups with the intent to destroy the existence of the group. Human rights, as laid out in the 1948 United Nations Universal Declaration of Human Rights, concern the rights of individuals.
In 1944, Polish Jewish lawyer Raphael Lemkin coined the term "genocide" in a book documenting Nazi policies of systematically destroying national and ethnic groups, including the mass murder of European Jews. He formed the word by combining geno-, from the Greek word for race or tribe, with -cide, from the Latin word for killing. Noting that the term denoted "an old practice in its modern development," Lemkin defined genocide as “a coordinated plan of different actions aiming at the destruction of essential foundations of the life of national groups, with the aim of annihilating the groups themselves.”
The next year, the International Military Tribunal held at Nuremberg, Germany, charged top Nazis with "crimes against humanity." The word “genocide” was included in the indictment, but as a descriptive, not legal, term.
On December 9, 1948, in the shadow of the Holocaust and in no small part due to the tireless efforts of Lemkin himself, the United Nations approved the Convention on the Prevention and Punishment of the Crime of Genocide. This convention establishes "genocide” as an international crime, which signatory nations “undertake to prevent and punish.” While many cases of group-targeted violence have occurred throughout history, the legal and international development of the term is concentrated into two distinct historical periods: the time from the coining of the term until its acceptance as international law (1944-1948) and the time of its activation with the establishment of international criminal tribunals to prosecute the crime of genocide (1991-1998). Preventing genocide, the other major obligation of the convention, remains a challenge that nations and individuals continue to face.