Funny enough, GB didn't even figure.
I was thinking of peace generally on earth.
I was thinking peace of mind on an individual basis.
I think peace on earth is a Star Trek fantasy. Heck, with all that peace on earth, they had to find all manner of aliens to fight to keep the viewing figures high. Even the hippy dippy Star Trekkers (like me) seemed to enjoy the conflict. A strange way maybe of saying there is little hope of world peace.
Peace of mind can be achieved at times. This could hardly be a constant, what with the whirl of the world, but certainly moments may occur with a openness to it.
So in this mad, conflict driven world, moments of peace are possible.