I don’t think it’s a weird thought, but earlier humans wouldn’t have been able to cause climate change as we understand it today or destroy themselves with nuclear weapons because the evidence would be readily available in the geographic record. I am a fan of the line of reasoning from people such as Hancock because I think he’s scratching on the surface of lost human history, but I think it’s something we have to look at scientifically and skeptically (in general). I find the work he’s discussed with the pacific north west in the United States to be particularly interesting.