The most terrifying factor is that a person's mental stability can change without warning or worsen over time without any warning. notices it. The majority of them are undetectable and can be caused by many variables. “There is no single cause of mental health disorders; instead, they may be caused by a mixture of biological, psychological, and environmental factors” (Symptoms, Causes, and Effects of Mental Health Problems). However, of all the factors listed, the most influential is considered to be environmental due to the fact that areas that have most cases of gun violence share similar conditions and criminal activity: "In cities, violent crimes and gun homicides committed by youth are concentrated in neighborhoods with high levels of poverty, drug trafficking, and/or gang activity. » (Tita, George) Growing up in conditions like these tends to develop a violent mentality in young adults and, undoubtedly, pushes them to commit crimes and participate in illegal actions. Being a topic of interest, the NGIC launched research into gang activity in 2011 and found that gun violence is centered on criminal activity rather than inappropriate use of firearms or at school.