Staying together for the kids...

I just read an article about this and it is something I have struggled with for a very long time. Is it ever the right thing to do? And when is... when is it not? I have made my decision and it has been hard... really hard. The thing that surprises me most, even in this article is how many people think you should stay, and why. I have a couple of close friends who have urging me in that direction for the last couple of years and it has made me so mad on virtually every occasion. I just don't see why you stay together if you are not happy, in love, kind to each other ot unable to be civil. This has been on my mind for days, bugging me. Today, in this moment, I don't think that people really change. And given that why should you stay together for the kids? If you are not able to change and fix things for yourself or each other you are certainly not going to do it for the kids. Agree or disagree?