Like me, I think childhood trauma can certainly trigger the genes for stuttering if you’re genetically predisposed to it. I was exposed to a lot of domestic abuse/violence in my earlier years and I believe it triggered the genes in me. There a millions of kids who suffer from domestic violence, but they do not stutter at all. Yes, they are socially withdrawn, but do not stutter at all. It’s still a neurological condition that can be triggered by trauma, or simply just manifest itself in early childhood years. For some it resolves, for others it does not.