Zak George is a popular dog trainer on youtube with his channel "Dog Training rEvolution" and also is the author of a book called "Zak George's Dog Training Revolution. Zak is mainly notable for spreading false information on large scale across youtube about dog behavior, bashing balanced dog trainers, and soliciting funds from his viewers. He is a member of the "positive dog training" community and actively encourages dog owners to avoid doing business with trainers who use various training collars.
Zak George has no formal education on dog training or canine behavior. Although he has not contributed anything significant to the dog training world, he must be made notable on this website for awareness purposes. His advice to ignore wolf and dog culture as it related to humans, may result in injury to humans and dogs.
His false claims about canine behavior and dominance can be further investigated here: Dominance Debunked: or is it?