answer:I dont know why would would have any reason not to believe this….. There is quite a bit of supporting evidence. Pangaea also isnt the only time that all the worlds continents were united. I think maybe if humanity evolved with there being one super continent things may have turned out better, but there also would have been less cultural diversity I think. If something like this were to suddenly happen over night (yes i know, impossible) I think it would be hell.