Conspecific aggression is an offensive behavioral strategy directed towards a competing member of the same species that is adapted to secure some resource at minimal cost.
Aggression, from the Latin aggressiofor attack, is frequently used synonymously for agonistic behavior which include threats, displays, retreats, placation, and conciliation. Psychologists define aggression as a behavior intended to harm another individual, which is less fitting for animals as they need not act with intent. Furthermore, while aggression is symptomatic for numerous psychiatric disorders, it is not necessarily an aberrant behavior, and it is considered to be adaptive for evolution and survival of animals and humans alike. Even so, there are still differing schools of thought on the origin and cause of human aggression...
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