I'm gonna remind the community here that blog posts are good for generating discussion and thinking about topics in different ways, but *please* do not accept anything like this guy's site as truth. I recently got my PhD in genetics. I clicked on the website and saw the blog post on stuttering genetics, evolution, and social hierarchies. "Uh oh," I thought. A generous interpretation after reading it is "yikes." The author says things like wolf packs adhere to alpha/beta dynamics, humans *need* to fit into leader/follower relationships (which are somehow genetically influenced), and the prevalence of stuttering implies that it is "selected for" by evolution. Every one of these points is bullshit. Regarding evolutionary selection for stuttering, specifically, you can try applying the same logic to any mental/cognitive/psychological trait or disorder and fall short-- our best guess is that the human brain is so insanely complex that the interplay of cognitive, emotional, and communication processing is simply gonna get a bit messed up in some people just by the law of large numbers and the diversity of humans. Not that its existence imparts benefit to the species. And that's just one post, the topic of which I'm somewhat educated in. All that is to say that we all have to be careful with people offering explanations and treatments and courses and cures to help us understand and deal with our stuttering.