Why is Meditation so important

Hello everyone!!
Today the world needs the word mindfulness. I think that the people have to focus on improving themselves and the world will be a better place. Recently, I watch the news and cannot believe what I hear from some people. I really believe that if everyone in the world meditated the Earth would be a paradise. Why is meditation so important? Because it helps to understand that everything in the world is temporary. And that the world is already perfect as it is so it means all my above thoughts have no sense.