John Vervaeke, Ep. 3 - Awakening from the Meaning Crisis - Continuous Cosmos and Modern...

Part three, is a history lesson about cognition and its development. So, not a huge surprise there, however, what we learn, is that cognitive fluency is relative to the material presented to allow you to learn (amongst other things). I can only do an hour each time I watch, there is too much information to assimilate if you try and binge watch, and this is a good thing ... clearly, educators make lectures last about an hour for a reason (had a doh! moment as I realised this) ... that will be an aspect of secondary thinking, which is covered in the second episode.

As an aside, and I am no expert on the Younger Dryas event, all I know is that which I have read on Wikipedia after learning of the hypothesis from friends a few years ago, John Vervaeke doesn't refer to it by name, but the historical context could well be there in the mix

Younger Dryas impact hypothesis

Younger Dryas