The UN is the least biased and most conflict-resolution competent organization we have. A UN presence should be new, limited and entirely non-military. It aims to facilitate, in a context of order, safety and respect for human rights, a peaceful and longterm negotiated settlement of all conflict issues between the parties. It's difficult, but not impossible. To summarise, there are so many ways to approach conflicts such as that in Kosovo.
Violence is the result of fear and lack of good ideas.
There you will find all the relevant links to Yugoslavia and the Kosovo province, too.