It is made clear in “Models, Mobals, and Migration” that demographics and geographics are ever-changing. Regardless of any type of professor or scientist’s credibility, any type of logical prediction will become outdated at some point in the future to come. De Blij uses geologist Arthur Howard’s rejection of the Pangea Theory, political scientist David Apter’s far miss of prediction of Africa’s future, biologist Paul Ehlrich’s neo-Malthusianism, and scientist Nigel Calder’s proposal of a self-cooling planet which happens to be a polar-opposite to the global warming controversy in global society. By simply viewing the Demographic Transition Model (DTM) that is accepted and used by geographers internationally, you can observe how demographic
