Aggression has always been a popular subject to portray in the media. From guys involved in fights to girls spreading rumors and excluding people, people have had a fascination with this issue. What interests me is the topic of how people become who they are. Is there a biological explanation or is a trait influenced more by the social environment? Aggression is one trait that many television shows and movies depict, such as Fight Club and Gossip Girl. Physically violent behavior is depicted more often in males, while relational aggression (indirect aggression) is more commonly shown in females.
The textbook explains that some scientists believe that higher aggression correlates to higher testosterone levels, but this is under debate since the correlation may also be true in the opposite direction. The textbook also details that female hyenas are more aggressive than their male counterparts. This supports the idea that aggression is related to testosterone levels since female hyenas show higher levels of a testosterone-related hormone, suggesting that testosterone does play a factor in aggression. But what are some other hypotheses that scientists have developed to explain aggression differences in males and females?
An article on Science Daily's website, "Why Men Are More Aggressive: What a Mother Should Know," suggests that the levels of aggression may be caused by the genes that are responsible for the neurotransmitter serotonin. In a study with Rhesus monkeys, a species of Old World monkeys who are known to be aggressive, show low levels of serotonin.
These are only a couple of a number of explanations for what causes aggression. These articles and explanations are all interesting I have is how I believe that aggression can be caused by genes as well as social pressures. However, the cause of aggression is still under research and will likely remain a controversial issue until more results from other studies are presented.