I'd like to propose a new rule for war. Why not limit battle to those who are over 75?
This would have at least three benefits. One, it would mean no longer cutting short the lives of the young. Two, it would create a new kind of arms race: rather than just spend on defense, countries would be motivated to spend on health care, doing all they could to keep the 75 and older crowd vibrant, strong and healthy. And it would mean that when you spent more on war you would almost automatically spend less on retirement, helping with deficit reduction.
Of course, that would mean that the world's toughest job would be the new job of carding heavily armed soldiers to confirm that they really are over 75.
[And thanks to Sarah for posting a picture of her son in uniform, thereby provoking this thought.]