The world is at peace,yet people are still dying from either diseases ,accidents or nature powers.
If you want more peace, maintain it, sacrifice and lead.
No single man can control how the world is going. They make you think that they have power, but the power has always been there.
You are part of the world. If you want more world peace, you can try to achieve your personal peace and maintain your surroundings. For you have the most control over yourself, and the things you do can make a difference to the people/environment around you. For example.I am far away from you, why would you want to make me more peaceful, like it's me that's keeping you from understanding what is more important and why you can't feel the peace part of the world, will you succeed in making me more peaceful, what if I am already in peace, or you think you know me.
There is a reason that rest in peace mostly reffers to death, if you want peace, fight for it till you achive it ,but most/many people die on the process. Then you know peace is not for all, you just live for what suits you most. Then you got lucky if you have peace before you die and it's always been what you wanted. Of course, it's just an old world view, but still something to think about.
So, maybe focus on yourself first, one step at a time.