In the same key, Lionel Tiger, a Canadian anthropologist, the author of the book “Men in Groups,” states that men have inherited from distant ancestors the irreducible propensity to form groups, and this propensity has become a kind of “backbone” of human communities. Initially, these groups were designed for hunting activities. Later, with the disappearance of the need to hunt, groups were formed based on other motivations. Through this ancestral group psychology one can explain why men from contemporary societies tend to join teams of fans, gangs, closed clubs, religious sects, militant coalitions, etc. On the other hand, female coalitions are almost nonexistent.Of all the studied cultures, rarely were “gangs of women” identified,while “gangs of men” can be found everywhere [Potts, 2006].What is the cause of this phenomenon? First of all,women didn’t have the aggressive and defensive motivation that men have, which would require the creation of militant groups. Their physical condition and mission of “future mothers” didn’t allow them to engage in acts of aggression and defense.