Genocide is the mass killing of a group of people. It is defined in Article 2 of the Convention on the Prevention and Punishment of the Crime of Genocide (CPPCG) as "any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such: killing members of the group; causing serious bodily or mental harm to members of the group; deliberately inflicting on the group conditions of life, calculated to bring about its physical destruction in whole or in part; imposing measures intended to prevent births within the group; [and] forcibly transferring children of the group to another group." Because of the insistence of Joseph Stalin, this definition of genocide under international law does not include political or economic groups.