I have studied history of dogs for 9-10 years AMA about them.

I have studied canines and their history as well as their genetics. I have also talked to many many trainers in regarding their training methods and why they do so including aversives, positive reinforcement only (r+), and impulsive (least favorite). I study their genetics and how dog genetics form their reactions to training and situations.
Anything I state will be backed up with sources of course, and I find most of my joy from dog’s history.
They are way more complex than we think and have an AMAZING history, each and every breed.