What is it good for?

No one really approves of war in general, that just people killing each other is a good idea. They might approve or disapprove of a specific war based on the conditions leading to it, and they might approve or disapprove of a specific war based on the effects of it. War can also be seen as optional or inevitable, depending on peoples perspectives of the specific war. Unless you're like the Joker or something, just killing people without considering the leading up to or the alternatives or the killing, you would not want to. People know and teach it everyday, in children's TV shows, it's often taught that violence can and should be avoided. Can real life conflict be avoided 100 percent of the time? No, probably not, but that doesn't mean no one should give up going out of their way for someone else. If war can be avoided, avoid it. If violence can be avoided, avoid it. Conflict isn't morally wrong, but mass murder is.