My guess is that this is a written speech that's been published with minimal editing. It reads as if it was originally supposed to be spoken, but with some sentences combined to make it more like written language. I teach academic writing and oral presentations to undergraduate students, and the first thing I tell them is that a written text and a spoken text are fundamentally different even when the texts talk about the exact same topic, and you can't turn one into the other with just a few minor changes. The lack of proper references is annoying, too - you can't just say "it is hypothesized that..." without telling us whose hypothesis you are presenting, it's not good practice.

The subject is interesting, though. I think it's worth trying to get past the presentation of the material, because the content is worth knowing.