The Wolf
A Wolf in Dog's Clothing
Domestic dogs are derived directly from wolves which entered villages in the Northern Hemisphere in search of food about 12,000 years ago. People exploited them for their own needs, such as to guard, herd and hunt. Particular characteristics were selected, which has resulted in the huge diversity of breeds today.
The key to unlocking communication with your dog is understanding his evolution and his direct relationship with the wolf.
In the wolf pack, there is a definite hierarchy which is strongly maintained and defended. There is usually only one male and female dominant breeding pair and the rest are arranged in order beneath them.
This is similar to how your pack should be - adults first, then children, then dog. Dogs are very conscious of hierarchy and will attempt to find their own place if you do not set this for them.