The theoretical possibility of extensive infanticide in the Graeco-Roman world.
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While the variety of responses of psychotherapy groups to new members is wide, this article addresses those that are treatment destructive, that is, murderous in that they are aimed at the elimination of a new sibling. A number of frequently encountered destructive response patterns to new members are illustrated and categorized. It is suggested that survival of the new member is best insured by adequate preparation of the group so that the nucleus of powerful feelings activated in this situation can be felt and expressed prior to the addition of the new member. A clinical example of appropriate preparation is offered, and the contributions of group therapists to new member casualties are noted.
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In cooperative groups of suricates (Suricata suricatta), helpers of both sexes assist breeding adults in defending and feeding pups, and survival rises in larger groups. Despite this, dominant breeding females expel subordinate females from the group in the latter half of their (own) pregnancy apparently because adult females sometimes kill their pups. Some of the females that have been expelled are allowed to rejoin the group soon after the dominant female's pups are born and subsequently assist in rearing the pups. Female helpers initially resist expulsion and repeatedly attempt to return to their natal group, indicating that it is unlikely that dominant females need to grant them reproductive concessions to retain them in the group.
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