Sadly, the psychiatry industry enjoys calling aggressive behavior "abnormal," and "maladaptive" when in fact, it is the complete opposite, except it's under a different name...."agonistic behavior."
Territory
Our personal space and things are ours and what do we do when someone messes with our personal things? We become angry. Although psychiatry may label that as having an anger issue, it is actually due to evolution and fighting for our territory. Animals see a territory as theirs and "own" it by using scent and if another animal tries to take it over, they will become aggressive and fight for what is theirs using displays such as perking up/"getting bigger" and showing their size. Voice may become more stern and their stance will change. As stated by Encyclopedia Britannica, ethologists claim this territorial defense seen in animals and our ancestors has stayed with us through the years.
Dominance
This is why some people are aggressive and attempt to dominant others, because they are attempting to mark their territory and defend it. No one owns another person but we all (including women) become dominant in different ways when faced with competition. Men and women alike become aggressive and defensive when faced with their partner talking to another person, or competition at work.
In other animals...
Agonistic behaviour is also seen in European bullhead, mice, ravens, dogs, blackbucks, and more. Dogs will show their teeth to signal to others what they could do, as blackbucks will thrash around.
Dominance and aggression are useful in the evolutionary sense and in the animal kingdom, they are not abnormal, but agonistic behavior.
Our personal space and things are ours and what do we do when someone messes with our personal things? We become angry. Although psychiatry may label that as having an anger issue, it is actually due to evolution and fighting for our territory. Animals see a territory as theirs and "own" it by using scent and if another animal tries to take it over, they will become aggressive and fight for what is theirs using displays such as perking up/"getting bigger" and showing their size. Voice may become more stern and their stance will change. As stated by Encyclopedia Britannica, ethologists claim this territorial defense seen in animals and our ancestors has stayed with us through the years.
Dominance
This is why some people are aggressive and attempt to dominant others, because they are attempting to mark their territory and defend it. No one owns another person but we all (including women) become dominant in different ways when faced with competition. Men and women alike become aggressive and defensive when faced with their partner talking to another person, or competition at work.
In other animals...
Agonistic behaviour is also seen in European bullhead, mice, ravens, dogs, blackbucks, and more. Dogs will show their teeth to signal to others what they could do, as blackbucks will thrash around.
Dominance and aggression are useful in the evolutionary sense and in the animal kingdom, they are not abnormal, but agonistic behavior.
References
Roger Abrantes. "Canine Ethogram—Social and Agonistic Behavior." Ethology Institute Cambridge. 9 Jul. 2015. Web. 7 Feb. 2018. <https://ethology.eu/blog/2015/07/09/canine-ethogram-social-and-agonistic-behavior/>
Sneddon, Lynne U.. "The influence of resource value on the agonistic behaviour of the shore crab, Carcinus maenas (L.)." Taylor & Francis. n.d. Web. 7 Feb. 2018. <http://www.tandfonline.com/doi/abs/10.1080/10236249709379027>
Ladich, Friedrich. "Vocalization during Agonistic Behaviour in Cottus gobio L. (Cottidae): An Acoustic Threat Display." Onlinelibrary.wiley.com. 26 Apr. 2010. Web. 7 Feb. 2018. <http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0310.1990.tb00797.x/full>
N.a. "What is agonistic behavior in animals? - The Handy Biology Answer Book." Papertrell.com. n.d. Web. 7 Feb. 2018. <https://www.papertrell.com/apps/preview/The-Handy-Biology-Answer-Book/Handy%20Answer%20book/What-is-agonistic-behavior-in-animals/001137031/content/SC/52cb01e882fad14abfa5c2e0_default.html>
AlleyDog. "Agonistic Behavior definition | Psychology Glossary | alleydog.com." Alleydog.com. n.d. Web. 7 Feb. 2018. <https://www.alleydog.com/glossary/definition.php?term=Agonistic+Behavior>
Contributors. "Agonistic Interactions – Mouse Ethogram." Mousebehavior.org. n.d. Web. 7 Feb. 2018. <http://mousebehavior.org/agonistic-interactions/>
Encyclopedia Britannica. "Agonism | behaviour." Encyclopedia Britannica. n.d. Web. 7 Feb. 2018. <https://www.britannica.com/topic/agonism>
The Blackbuck. "Agonistic behaviour." The Blackbuck. 16 Oct. 2009. Web. 7 Feb. 2018. <https://blackbuck.wordpress.com/behaviour/agonistic-behaviour/>
Wikipedia Contributors. "Agonistic behaviour." Wikipedia, the Free Encyclopedia. Wikimedia Foundation, 5 Feb. 2018. Web. 7 Feb. 2018. <https://en.wikipedia.org/wiki/Agonistic_behaviour>
Roger Abrantes. "Canine Ethogram—Social and Agonistic Behavior." Ethology Institute Cambridge. 9 Jul. 2015. Web. 7 Feb. 2018. <https://ethology.eu/blog/2015/07/09/canine-ethogram-social-and-agonistic-behavior/>
Sneddon, Lynne U.. "The influence of resource value on the agonistic behaviour of the shore crab, Carcinus maenas (L.)." Taylor & Francis. n.d. Web. 7 Feb. 2018. <http://www.tandfonline.com/doi/abs/10.1080/10236249709379027>
Ladich, Friedrich. "Vocalization during Agonistic Behaviour in Cottus gobio L. (Cottidae): An Acoustic Threat Display." Onlinelibrary.wiley.com. 26 Apr. 2010. Web. 7 Feb. 2018. <http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0310.1990.tb00797.x/full>
N.a. "What is agonistic behavior in animals? - The Handy Biology Answer Book." Papertrell.com. n.d. Web. 7 Feb. 2018. <https://www.papertrell.com/apps/preview/The-Handy-Biology-Answer-Book/Handy%20Answer%20book/What-is-agonistic-behavior-in-animals/001137031/content/SC/52cb01e882fad14abfa5c2e0_default.html>
AlleyDog. "Agonistic Behavior definition | Psychology Glossary | alleydog.com." Alleydog.com. n.d. Web. 7 Feb. 2018. <https://www.alleydog.com/glossary/definition.php?term=Agonistic+Behavior>
Contributors. "Agonistic Interactions – Mouse Ethogram." Mousebehavior.org. n.d. Web. 7 Feb. 2018. <http://mousebehavior.org/agonistic-interactions/>
Encyclopedia Britannica. "Agonism | behaviour." Encyclopedia Britannica. n.d. Web. 7 Feb. 2018. <https://www.britannica.com/topic/agonism>
The Blackbuck. "Agonistic behaviour." The Blackbuck. 16 Oct. 2009. Web. 7 Feb. 2018. <https://blackbuck.wordpress.com/behaviour/agonistic-behaviour/>
Wikipedia Contributors. "Agonistic behaviour." Wikipedia, the Free Encyclopedia. Wikimedia Foundation, 5 Feb. 2018. Web. 7 Feb. 2018. <https://en.wikipedia.org/wiki/Agonistic_behaviour>