There is a problem with weapon development and use in the modern world. There is also a debate whether arm race contributes to the violence in the world. Some scholars, politicians and military representatives agree that the mere presence of weapon can increase violence and aggression in the world; however, there are contradicting opinions that state weapons serve as a calming device. Thus, guns can be seen as instruments of destruction or protection. From a psychosocial perspective, it is beneficial to understand that guns may not influence the aggressive behavior of those who use them, whereby, there is a possibility that guns can increase the aggressive nature of a human being. This paper will show that guns themselves do not increase aggression in people simply because weapons are in their presence. Gun possession is not a cause of aggression in humans because several people across the world own guns and have never injured or killed anyone using a gun. If guns were the cause of aggression, consequently, most developed nations like the United States of America would have totally banned gun possession among the civilians. Guns alone do not kill people instead people kill other people. Current statistics indicate that homicide is no longer the top cause of mortality in America (Webster, Doob, & Zimring, 2006). Although, some researches show that there is a correlation between gun possession and crime, this correction is not strong enough to be regarded as causal. The rationale in this argument is based on the understanding that guns alone do not cause death, and there are people who possess guns who do not kill other human beings. Aggression in human beings is caused by physical, hereditary and emotional factor (Anderson & Bushman, 2002). Several studies have shown that aggression is triggered by thoughts that are conspicuous in the brain. These thoughts then make people act senselessly leading to adverse effect such as death. People who experience irrational thoughts in their mind may cause harm to other people, and if they are in possession of a gun, they may be aggravated to kill, but not all people result to killing. This is an indication that the presence of a gun is not a cause of aggression rather a tool that aggravates aggression in some people. Most researches have highlighted hereditary and environmental factors, poor child rearing and exposure to hostility, economic and social aspects and the media as the cause of aggression. Heredity and Environment Factor Several researches done on infancy conduct disorder have shown that maternal and paternal genetics influence the behavior of the children. These researches concluded that offspring of belligerent parents are more prone to developing behavior disorders, as opposed to offspring of social parents, even if the children were nurtured in an adoptive household. This conclusion suggests that genetic is a cause of violence (Anderson & Bushman, 2002). On the other hand, there are children who are raised in nurturing homes but turn out to be violent. In view of this, a child raised in a violent household does not necessarily become violent. Similarly, the risk of a child developing behavioral disorder is higher among these offspring if they are reared in a hostile domestic condition, signifying that ecological aspects also predispose a child to violent conduct. Poor Par