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WRONG. they were even more destructive than modern humans. They brought local species to extinction with far fewer numbers and almost no technology

But whereever and whenever it came, the capacity in our species came first. Otherwise you need to explain why certain human populations are (seemingly) so wise and virtuous.

Maybe intelligent is a label that man gives itself out of pure ignorance

A brain is a tool and pretty much like every tool, there's a good way and a bad way to use it. Humans had great minds, even philosophers like Mark Aurelius who also ran states. But humans no longer have that intellectual spark in them. The system doesn't feed thinkers, rather favors pragmatists.

First, he links intelligence with a lack of predators. Then he suggests that leads necessarily to planetary destruction. In both of those assertions there is no logic laid out to support them. I seriously question the second one.