Except he doesn't say "we've been recording fighting for 5,000 years," he says "we've been fighting for 5,000 years." There's no ambiguity there, unless you're delusional.
There is an odd phenomenon prevalent on the 'net: the presumption that a short blurb written with a small audience and particular point in mind should, somehow, contain encyclopedic completeness to every conceivable objection any twit may conjure up, no matter how ill-informed or tenuously applicable.
That´s why sometimes silence is the only viable option, any other one only receives mental onanism as a response, the conversations ends in the same place but with the OP mentally exhausted.