Raphael Lemkin was a Polish-Jewish lawyer who is best known for coining the term 'genocide' in 1944, describing the systematic extermination of a particular group of people. His work played a crucial role in the development of international law concerning mass atrocities, emphasizing the need to prevent and punish such acts on a global scale. Lemkinโs advocacy led to the adoption of the United Nations Genocide Convention in 1948, establishing genocide as an international crime.