His point is invalid, because if “civilisation” is just hitting each other with different kinds of rocks, then nothing has really changed: we’re not more CIVIL!
Discussion
No. It is not invalid. Civilisation is multi fazetted. But it is a product of hugely over weight of good people using the technologies invented, in a good way compared to how badly it could have been used If the bad people where in total control of it. Then We would have been stuck with rocks🤷