Dogs are pack animals. This is one of the great things about having a dog in your family. They naturally want to do their share of work and earn their spot in the pack. They instinctively compete for:
Space. Treats. Affection. Respect.
Our challenge (and responsibility) is to foster their confidence and independence. As the leader, your command is trusted and your reward is obedience. Establishing proper pack behavior will ensure a healthy environment for everyone.