You are right, because if people could simply communicate with one another, agree to disagree, or learn to stay out of each others way, then a lot of wars would be avoided and a lot less people would die. However, when you have two or more people/ countries that are just so stubborn they can't see anyone else's way but their own, then that's when the problem starts. That's why we need to start teaching others and ourselves how to communicate and work with others. Even though we as individuals might not start a war, too many could.
Sorry, you probably weren't asking for a paragraph but there it is XD