The major root violence is biology, everyone is born with violence inside then it is a natural instinct to be aggressive; what turns aggression into violence is the secondary root; the nurture that a person receives. Biology is the most important factor because it establishes how hostile a person will be. Environment is also a root to violent behavior because it molds the natural violent makeup in an individual. The third most important factor that causes violent behavior is the interaction of environment affecting biology. These three factors are the roots to violent behavior. Biological factors that affect violent behavior include biochemical imbalances, testosterone levels, serotonin levels and brain defects. Violence must have mainly a biological as a root because violence occurs in all cultures, no matter how different their social structures are. Almost 90% of violent criminals are men, many of them young. The male is almost always...