If we ourselves remain angry and then sing world peace, it has little meaning. First, our individual self must learn peace.
This we can practice. Then we can teach the rest of the world.
At a fundamental level, as human beings, we are all the same; each one of us aspires to happiness and each one of us does not wish to suffer. This is why, whenever I have the opportunity, I try to draw people's attention to what as members of the human family we have in common and the deeply interconnected nature of our existence and welfare.
I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago.