"Boys with sticks", by Simcha Fisher.
My favorite exerpt:
Boys who are never allowed to be wild are boys who never learn how to control that wildness. Boys who are not allowed to whack and be whacked with sticks never learn what fighting is like. What’s so bad about that? Well, they may end up hitting someone weak, with no idea how much it hurts to be hit. Or they may end up standing by while the strong go after the weak – and have no idea that it’s their job to put a stop to it.Read the whole thing, right down to the (also quotable) last paragraph.
Either way, the weak suffer. The whole world suffers.