meheleventyone has demonstrated how easily even just referencing the article I myself posted could undermine my argument.
I'm not a historian. But my wife is. And she ranted for a while after the first ten minutes of this talk for precisely this reason. I could have provided more scholarly sources. It is an internet forum - I didn't think people would call me names if I didn't. That historians of science don't like the term "The Dark Ages" isn't exactly cutting edge scholarship.
I don't believe that he did put a lot of research into the historical background. It is possible I am wrong. The reason I believe this is because at least one historian I trust who works in an adjacent subfield went on a big rant about these being classic misconceptions.
I believe that Blow is very smart and quite knowledgeable about software. I also believe that a lot of engineers believe that they can make huge claims about the nature of history without consulting professionals. These errors are often harmless but the are also often harmful, either causing us to draw false conclusions about the past or today.
Like you say below, Blow would have been better off skipping the first 10m of his talk.
Unfortunately as far as I can tell, we don't have a circuit of public intellectuals, who happen to be historians, giving well thought through talks to lay people. We have ted talks on a good day, and those are often filled with dumb things said by smart people who should know better.
You and I haven't even touched with a ten foot pole the other side of the coin of that "Western History" implies. I won't attempt to in this thread either.