1.   In chimpanzee societies, male chimps try to control access to a small number of females, but not with complete success.

2.   The famed Jane Goodall observed male chimps in Africa patrolling the borders of their territories, mounting gang attacks on members of neighboring groups.

3.   The male chimps protect the females and babies from hostile attack and also from starvation.

4.   They were lured into their new homes with apples and marshmallows, while the male chimps in enclosures around them strutted and posed.