Europe has gangs and drugs but nowhere near the deaths that we have. The difference is guns. Not my opinion, just simple fact and the sooner we address our gun problem, the more lives will be saved. 

"Murder is the second leading cause of death among Americans aged 15 to 24, the study found. The research also showed that murder was the third leading cause of death among those aged 25-34. Compared to those in the same age groups in other wealthy countries, Americans aged 15-24 are 49 times more likely to be the victim of a gun-related murder. For those aged 25-34, that number is 32 times more likely, the research revealed." - The American Jorunal of Medicine, February 2016