Indeed , Ben is a worse case scenario guy , more a salesman as a scientist . Bit of a dreamer to , but entertaining content sometimes . Then is this what will collapse human existence ? Compared to climate warming/change that is said to be driven by humans i go for universal driven change like cosmic ray's and solar activity . Where i must point at the way human's have destroyed there own food chain the last 70th years with chemicals and DNA manipulation on plants . The soil is poisoned for profit way to long .
And in doing so human's have a good change on destroying themselves at intellectual level way before any other disaster will strike .
B.t.w. , those link's have more then 2 video's behind them , i was just a bit outrages , i meant , there's a lot , not all , for that can never be true . ;-)
I think the pole reversal is unlikely to end our existence, even in the worst case scenario. I think the highest probability of our exctinction comes from collision with space objects. We can poison this planet for another 1000 years and we'll survive, just not well. We've already survived several global catastrophes, including an ice age, the great flood, and at least one 2 year long 'nuclear winter' brought on by a volcanic eruption in the 1800's.