a poor mental health system is the major killer. my wife is a therapist so I hear about it first hand all the time. any time there are budget constraints on government, whether it be local, state or federal, the very first thing that gets cut is funding for mental health. As a result of this, people who were previously working with a social worker or seeing a therapist or, worst of all, being medicated for mental health issues, get thrown out of the system. Once this happens, they go unchecked, unmedicated and unmanaged and very often terrible things happen as a result. we can go back and forth debating whether we should allow this gun or this magazine or whatever, and there are good arguments and points from both sides, but there is no arguing that mass shootings are carried out by white men in their early twenties. this is when the onset of serious mental health issues begin and, unfortunately, also is the first time that most people are experiencing freedom and self-reliance for the first time. This enables many of these people to fall through the cracks, especially those who are paranoid and do their best to stay out of the eye of society.