Aggression in our lives is associated with rage,anger,anger.Such behavior is followed by negative attitudes.Many psychologists believe that this is an innate quality.
Aggression may have a different nature from the infliction of physical force,shouting,oppositional behavior,irritability to external stimuli.
Aggression can manifest itself covertly,positively or on direct directed on Ob ect,use weapons,inflicting in rede itself suicide.
Unfortunately, aggression is dependent on our unconsciousness balance of the death and live pulsions.
Some people that don't control their death instinct, will always project it outside as aggression to family, job, and friends, and "eating" their instint of life like a drug addict.
Normally these people have a high degree of internal frustration but they always blame others for it.