Adolescence is a time of biological paradigm shift. Suddenly, all those hormones are surging through young bodies before the life experience or critical judgment is in place to channel "the force." Add to the mixture, a media absolutely awash in violence and often using people like Bruce Willis or Tommy Lee Jones to "sex up" the use of firearms; and it's a dry forest awaiting a spark. Lethal firepower happens.
Some posters like the anti-depressant item. It certainly IS true that our culture, under the influence of Big Pharma is prescribing a chemical cocktail for every real and imagined condition. And anti-depressant drugs DO carry sinister side effects.
In borderline adult shooters, although seldom mentioned, these young males are not very macho looking or muscular and it could be that they feel that the only way they can prove their manhood within a culture that has been, of late, conditioned to prize militarism and soldiers is to let the bullets rip...
The other thing--and I think it is playing a huge role in the uptick in weekly shootings--is the financial condition of not just our nation's economy. Most people feel "potent" if they can pay their mortgage, car payment, and put food on the table. When these BASICS of life feel threatened, some people lose it.
And with so many corporations cutting jobs or off-shoring them; and with so many jobs paying a pittance or using temp. work to forego the payment of any benefits, more and more people--particularly male people--are feeling they have nothing left to lose, so they let loose on the nearest crowd.
I don't have an issue with guns kept in people's homes to keep them safe. But this idea of "carrying" a weapon--with or without a license, and carrying a weapon that can kill MANY persons in a matter of seconds is SICK. It's about as sick as a nation being inculcated into militarism as its way of life with half of all discretionary funds going towards soldiers, military bases, ongoing wars, planned wars, and the weapons for air, ground, and sea to launch them. SICKO.
Mars rules needs a lobotomy!