How to prevent resource guarding over a person

First, what is resource guarding? Resource guarding is a behavior where a dog aggressively defends something it values, like food, toys, or even a person, because it has a need to possess something, has a more dominant personality, or has experienced insufficient supplies of said resource. 
Resource guarding is often linked to protecting food or toys, but it can also extend to a specific person. This means your dog might show signs of possessiveness or aggression when it comes to you or another family member. 
The first two situations can often be managed easily by controlling the resources and not giving the dog the need to feel that it has to defend that resource. Resource guarding over a person can be a bit trickier and usually has a couple of different reasons, but I will do my best to help you to understand them. 
In almost all cases where a dog is resource guarding a person, the dog sees the person as an item to possess. How does this happen? This can happen when the roles between the dog and the owner aren’t clear or the owner has not imposed any clear structure and rules in the relationship with the dog. While we all see our dog as our best friend, very rarely do they grasp the concept of friendship, they all operate more on a level of one being the leader and the other one being led. All dogs are pack animals; a pack is never just a group of individuals bonded together through friendship and democratic arrangements. There is always one that leads. Another reason that can lead to resource guarding over a person is seeing your dog as your personal bodyguard. Without any proper and professional training, your dog does not understand how to handle situations that are truly a threat to your well-being, so they will just assume that everything is a threat and act accordingly. This can also happen when too many human emotions like empathy seeking and looking for reassurance are imposed on the dog, which are confusing for canines since this is not a behavior natural to them. This seems vulnerable to dogs, which is in direct contrast to a strong and trustworthy leader. 
Resource guarding can also present itself when there are multiple dogs in the household, and one dog feels like it is above all others in the hierarchy arrangement and demands all attention for itself. 
When you bring a dog into your life, it's crucial to establish yourself as the pack leader. This means creating structure and setting clear boundaries, much like an authority figure. Obedience training is a great way to do this, as it helps your dog understand their place in the world and your role as their leader. Do not forget it was your idea to bring your dog into your life, not the other way around. You have to be what your dog needs: a strong and trustworthy guide in the human world.