If you experience trauma, it could influence brain development. Brain development can be influenced by poverty, dysfunctional family life and exposure to violence. Mother-child bonding is critical for proper brain development. Marijuana is the most used drug in the world today: marijuana is the highest cash crop in america, marijuana exceeds, cash wise, corn. High school: social skills developing and changes influences by friends, school environment, culture. All youth want to belong to a group, something bigger than themselves. Everyone desires this, sort of instinctual in nature. Grouping behaviors usually starts between 11 and tends to end around 18ish. Grouping is natural tends to be a function of: ethnicity, environment, location. There are a number of reasons why youth join groups like gangs. Hormones drive grouping and choosing a social (group) identity. Group identity becomes the source of self worth for many youth. If you remove the group identity we need to replace it.