Answer:
United Nations respond to acts of genocide since 1948.
Explanation:
After witnessing the horrors of the Holocaust by Nazi German on the Jews, political prisoners and other ethnic groups. The United Nation labelled genocide as a crime under the UN Convention in 1948, which came into effect in 1951. The efforts of Raphael Lemkin, a Jewish-Polish lawyer, played a significant role in making genocide recognized as a crime under international law.
