a short history of progress a study of history adaptive capacity ancient egypt ancient rome angkor angkor wat apocalypse apocalyptic and post-apocalyptic fiction archaism armageddon assyria assyrians babylonia cahokia capitalism chin civilization classical greece complexity consumerism creativity culture decline demography diaspora diminishing returns disciple doomsday doomsday clock doomsday argument doomsday cult doomsday device doomsday event doomsday film eroei earthquake easter island end time eschatology etruscan civilization failed state famine fragile state genocide global empire greenland gupta empire han dynasty historian history of greenland hittites human condition human extinction indus valley civilization izapa joseph tainter khmer empire korea levant list of disasters magnum opus malden island malthusian catastrophe manchu maya civilization medieval greek medieval demography millennium ecosystem assessment moai mongol empire mughal empire mycenaean greece natural disaster natural environment norsemen olmec overpopulation pandemic peak oil planetary phase of civilization planned obsolescence polynesia population population density population dynamics proletariat society sumer survivalism tang dynasty ten threats trajan tsunami united kingdom war western roman empire world war iii