It seems lately that there's been a lot of discussion on reddit recently on whether the Irish famine was a genocide. It made me wonder what historians consider the official first genocide. The systematic, intentional killing of a certain race seems pretty modern.
Note that genocide does not necessarily involve killing.
Excerpt from the Convention on the Prevention and Punishment of Genocide
"Article II: In the present Convention, genocide means any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such:
(a) Killing members of the group;
(b) Causing serious bodily or mental harm to members of the group;
(c) Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part;
(d) Imposing measures intended to prevent births within the group;
(e) Forcibly transferring children of the group to another group.