Jorge Bourdette Posted 28 days ago David Christian: The history of our world in 18 minutes It is a good talk, captivating, but there is a big issue: several things that are speculation are shown as proved true. This may fool people into believing that we know everything about the big history, and this is simply not true. It's more challenging to know that there is still a lot of place for investigation... This talk is a good simplification of complex matters, it's ok for teaching basics, but - for me - it's very important to teach also that what happened is in fact more complex. For example, why are humans the only species capable of collective learning? (to the extents we are) what is the root cause? a complex brain? a proper social environment, favoured by the fact that we have to be grown by our fathers - while in other species children grow by themselves? And more... Lots of questions can be stated, and this is what is wonderful about education: to animate people to make questions and not giving them the answers as if "it's just this way".