I have a couple of thoughts, by no means exclusive or comprehensive.
1. We definitely need a dialogue on how best to handle mental illness. There is such a societal stigma attached to it, and then we seem to only want to touch it with kid gloves, by making light of it, or joking (have you ever called a psychiatrist a “shrink”?). We are far more educated about the workings of the human brain than we were even 50 years ago, but we are light years away from understanding it completely. We have no problem running off to a doctor for the slightest physical ailment, yet despite the fact that the brain is far more complicated than all the other organs in the body combined, we hesitate to do something when things “aren’t right”. Often mental illness is left to the parents, or families, and society simply ignores it. We need to change our attitudes about it. In the process, we’ll not only have a better understanding of what makes the Adam Lanza’s of the world tick, but we’ll make great strides in dealing with other societal ills, such as homelessness, suicide, drug addiction, etc.