I've lifted this from Facebook

  I lifted the above from Facebook.  It intrigued me.
Right and wrong can sometimes just be a case of perspective.  Everyone from whatever country they live in believe that their soldiers are fighting for "right".
I'm not saying that extremists are right in their thinking. 
Ways of life, and in some countries religious beliefs can make people fight against others. And the soldiers in the armies are not always there by choice.  Even in this day and age there are countries that have mandatory military service.  These people may not agree with the reason their country is fighting, but will probably face the alternative of prison if they refuse to comply.
It would be lovely to live in a world where there is no fighting going on, but as long as some countries think they have a right to impose their will on others fighting will continue.

I know this post is not my normal sort of post, but it made me think, and my conclusion was there will probably always be fighting as each side usually believes that they are right.  It would be lovely for things to be settled by "talks" and "summits", but frankly I can never envisage that happening.