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autogenocide
autogenocide n. 
/ˌɑdoʊˈdʒɛnəˌsaɪd/ (a) the self-destruction of the entire human race (rare); (b) the mass killing by a government or regime of a section of its own people.
Brit. /ˌɔːtə(ʊ)ˈdʒɛnəsʌɪd/
, /ˌɔːtə(ʊ)ˈdʒɛnəsʌɪd/U.S. /ˌɔdoʊˈdʒɛnəˌsaɪd/
, /ˌɔdoʊˈdʒɛnəˌsaɪd//ˌɑdoʊˈdʒɛnəˌsaɪd/ΚΠ
1958 A. Toynbee in Western World Dec. 33/1 This Western community..is already on its way towards being merged in a worldwide society that will eventually include the whole human race, if mankind does not commit auto-genocide en route.
1963 V. Chu Ta Ta, Tan Tan xi. 165 The simple, elemental truth is that Communist China is committing the biggest auto-genocide in human history.
1989 N.Y. Rev. Bks. 21 Dec. 24/1 (advt.) Staub then considers the behavior of perpetrators and bystanders in..the ‘autogenocide’ in Cambodia.
2002 Washington Post (Nexis) 13 Oct. b2 The mass death in Cambodia under the communist regime of Pol Pot was not an episode of ‘autogenocide’ comparable to the Holocaust.
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