Genocide Convention
Kiernan states that some genocidal massacres are carried out against groups that are not covered by the Genocide Convention—such as being a member of a political party, or social class—but that these are covered under local laws and international treaties that criminalise crimes against humanity. However he does acknowledge that massacres against groups other than those in the Genocide Convention, and where the intention of the perpetrators did not specifically intend to commit genocide, are a grey area.