Modern dogs learn bite inhibition for the same reason that their ancestors, the wolves, did: in order to establish an effective dominance hierarchy.[5] It allows for tranquility in large groups when each individual knows its place. Dominance hierarchies may be formed in groups of canines through intense displays of aggression.[6] However, this type of vying for dominance has only been observed in forced groupings of captive wolves.[7] In the wild, this trend is less common, as wolves tend to group off into family units instead of unrelated adults. Therefore, the alpha male and alpha female would simply be the parents, and the offspring would submit readily.