The social organization of a group of wolves in a large outdoor enclosure was followed through several breeding seasons. During the breeding season conflicts become more frequent and the social hierarchy obvious. The more dominant animals restrict courtship activities by inferior wolves of their own sex. However, apparently as a correlate of their position, two alpha males have shown less mating activity than other males. Mate preferences exhibited by animals of both sexes also limit the number of matings. The preferences appear related to the social hierarchy existing when an animal matures. Cultural transmission of social status is suggested by some changes in ranking of wolves raised in the woods at Brookfield. Temporary removal of the original alpha male and death of the original alpha female appear to have promoted changes in social order and an increase in actual mating combinations. The probable consanguineous nature of wolf groups and facets of the social behavior suggest that some form of group selection could be operative in the wild.