Why is there no such thing as world peace?

There is such thing but at this moment in time it is unattainable. The idea of world peace is considered good although unlikely in our atomic age world

There will be many challenges and deaths and incomplete journeys before anyone will ever decide that it is the right time for peace. Since not one person in the world has ever been flawless, peace has never been achieved. As the world grows older, people will disappear and appear again until there is no more universe, no more earth. We can try to help one another and love each other, hard as it is, but world peace is infinitely complicated and impossible.