o black holeStrangeletSynthetic intelligence / Artificial intelligenceAI takeoverExistential risk from artificial intelligenceTechnological singularityTranshumanismYear 2000 problemYear 2038 problemYear 10,000 problemSociologicalAnthropogenic hazardCollapsologyDoomsday argumentSelf-Indication Assumption Doomsday argument rebuttalSelf-referencing doomsday argument rebuttalEconomic collapseMalthusian catastropheNew World Order (conspiracy theory)Nuclear holocaustcobaltfaminewinterSocietal collapseWorld War IIIEcologicalClimate changeAnoxic eventBiodiversity lossMass mortality eventCascade effectCataclysmic pole shift hypothesisClimate apocalypseDeforestationDesertificationExtinction risk from climate changeTipping points in the climate systemFlood basaltGlobal dimmingGlobal terrestrial stillingGlobal warmingHypercaneIce ageEcocideEcological collapseEnvironmental degradationHabitat destructionHuman impact on the environmentcoral reefson mari