GLOBALPRIORITIESPROJECT2017ExistentialRiskDiplomacyandGovernanceGLOBALPRIORITIESPROJECT20172EXISTENTIALRISK:DIPLOMACYANDGOVERNANCETableofcontentsAuthors/acknowledgements3Executivesummary4Section1.Anintroductiontoexistentialrisks61.1.Anoverviewofleadingexistentialrisks6Box:Examplesofriskscategorisedaccordingtoscopeandseverity71.1.1Nuclearwar71.1.2Extremeclimatechangeandgeoengineering81.1.3Engineeredpandemics91.1.4Artificialintelligence91.1.5Globaltotalitarianism91.1.6Naturalprocesses101.1.7Unknownunknowns101.2.Theethicsofexistentialrisk111.3.Whyexistentialrisksmaybesystematicallyunderinvestedin,andtheroleoftheinternationalcommunity111.3.1.Whyexistentialrisksarelikelytobeunderinvestedin111.3.2.Theroleoftheinternationalcommunity12Section2.Recommendations16