Mesquida and Weiner’s findings turned anecdotal observations into an empirically grounded theory: nations with a large ratio of 15 – 29 year old men (young) to 30+ year old men (old) tend to ...

One prominent hypothesis within the framework of evolutionary psychology is that men are more combative because they possess a “coalitional psychology” and tend to engage in coalitional aggressive ...

Intraspecific coalitional aggression is rare among all species, especially within stable social groups. We report here numerous cases of intraspecific lethal gang aggression within stable groups of ...