I skipped to where I thought I see something about something "sciency", and I found the section when you skip to
> Just to clarify here for our readers, obviously, you’re poking holes in Darwin’s Theory of Evolution but you’re saying it only tells the story up to a certain point...
I don't understand what he is talking about. I mean, where is that "controversy"? I can only see what's in that article, I don't know what else he may have said or written elsewhere. I only took biology classes on edX the last few years (the most important one was [0]), and nothing he says in that section is "controversial". Genetic drift and small populations are part of the teaching, if you go to edX's course "Nature, in Code: Biology in JavaScript" [1] you even get to simulate just that numerically, population bottlenecks, genetic drift, and more. I recognize everything he said from the courses I took, or from lecture videos on Youtube (by biologists and geneticists, specifically, e.g. this one: [2] - very funny guy too).
Going only by what I see in that article, in that section, I can only assume he is making a mistake in declaring some imagined and made-up "controversy" where none exists.
What am I missing?
To me his statements are like somebody trying to defend their "controversial" point of view that the earth is on a course around the sun, making very defensive statements because they think, for whatever reason, they are saying something incredibly controversial.
[0] https://www.edx.org/course/introduction-biology-secret-life-...
[1] https://www.edx.org/course/nature-code-biology-javascript-ep...
[2] https://www.gresham.ac.uk/professors-and-speakers/professor-...