From a biological perspective, aggression is highlighted as a necessity for …show more content…
Archer (2004) suggests that they are. Sexual Selection Theory and Social Role theory based on the evolution and social learning theory respectively; provide the basis for Archer’s (2004) meta-analytic review of “Sex Differences in Aggression in Real World-Settings.” Sexual Selection Theory (SST) [cited by Archer (2004)] explains the perceived gender difference in physical aggression as “a consequence of unequal parental investment leading to a greater male than female reproduction competition and, therefore, overt aggression.” (Archer 2004, p 3). As an evolutionary theory, emphasis is placed on early onset of behaviours; hence the Sexual Selection Theory stressed that sex differences in behaviour were seen from any early age. According to Baillargeon Tremblay, & Willms 2004 [cited in Archer (2004)] sex differences in aggression occur early in life, from approximately 2 years