I think the only one who can stop war is the government.  They have resources to do it however its not that easy to stop it because there are business man who are doing their very best to start a war. Starting a war is simple on them, a simple conflict with lives lost can ignite people's heart and start a war. This has been happening repeatedly and the sad thing is that we never learn. The other thing that can stop war are the people. If all the citizens have the same goal, they can probably stop the war. This happens in our country but there are a lot of lives lost when this happen.