“…Testosterone is associated with an increase in both sexual arousal and aggression in men and women (Glina, 2004;Hermans, Ramsey, & van Honk, 2008;Olweus, Mattson, Schalling, & Low, 1988;Tuiten et al, 2000). Furthermore, most instances of global violence and homicide are perpetrated by young men against other young men (Daly & Wilson, 1988), the same demographic that is disproportionately represented in militaries and coalitional combat units across communities and generations (though most generals, bureaucrats, politicians, leaders, and other "behind the scenes" individuals are usually older; see Browne, Chapter 22, this volume).…”