The authorities will deal with Nidal Malik Hasan, the Army psychiatrist who is accused of bringing the nightmare of mass murder into the sanctuary of a military base on American soil. But the rest of us need to look very closely at the stress beyond belief that is being endured by so many other men and women in the armed forces  men and women who are serving gallantly and with dignity, who have not taken out their frustrations on one another, and who deserve better from the broader society.

Simply stated, we cannot continue sending service members into combat for three tours, four tours, five tours and more without paying a horrendous price in terms of the psychological well-being of the troops and their families, and the overall readiness of the armed forces to protect the nation.

The breakdowns are already occurring and will only get worse as the months and years pass and we remain engaged in the conflicts in Afghanistan and Iraq. None of this is the military’s fault. There have not been nearly enough people willing to serve in the all-volunteer armed forces to properly staff two wars that have already gone on for the better part of a decade.

I spent some time on the West Coast recently interviewing doctors and researchers studying the enormous problem of troops returning from Afghanistan and Iraq with some form of mental health disorder, most commonly depression and post-traumatic stress disorder, or P.T.S.D. The caseloads are off the charts, and very often the P.T.S.D. or depression (or both) are accompanied by substance abuse, problems with anger management, domestic violence and family breakdown.