According to Wikipedia:
According to one estimate, from 1956 to 2016, a total of forty-three genocides have taken place which caused the death of about 50 million people, while an additional 50 million were resettled or displaced by such conflicts.
In 1944, Raphael Lemkin created the term genocide.
Before 1944, various terms, including "massacre" and "crimes against humanity" were used to describe intentional, systematic killings.
https://en.wikipedia.org/wiki/Genocide#Genocide_in_history
https://en.wikipedia.org/wiki/Genocides_in_history
