Why didn't the Romans have hot air balloons?
The informative first half of the article was fascinating, but it slowly deteriorated from there as I read the argumentative second half.  In my view, things took a drastic turn for the worse around this sentence:Mature genetic engineering, nanotechnology, strong artificial intelligence, and quantum computing, to name but a few, each hold many times the potential for systemic harm to, or destruction of our civilization; and they do so absent the inherent check on their proliferation that was present in the case of nuclear energy...The suggestion that strong artificial intelligence and quantum computing are more likely destroyers of civilization than nuclear energy seems laughable without further argument.  As with nuclear weapons, problems only arise in the application of technology by humans, not in the concepts themselves, and I see far more potential for physical and societal devastation in the application of nuclear weapons than in AI or QC.