This is an interesting article.

The very interesting point is made about Alpha dog/wolf puppies...

My life as a wolf, by British naturalist who dared to infiltrate a pack in the wilderness | Mail Online

People think it's good to have an alpha dog, believing it to be the bold one who comes to say hello when you go to choose your puppy from a litter. That is not the case. Alphas stay at the back of the kennel because they have a strong sense of self-preservation. They never put themselves in jeopardy.

If you take a true alpha puppy home with you, he will be a quick learner, easy to train so that one day, when he sees the time is right, he can take over the pack. And he'll be looking for that day, for a sign of weakness in you that suggests you are no longer capable of doing the job.