One Thing to Change The World

In my opinion, to change the world we should stop any war the entire world .The developed countries have to do their best in improving the relationships, between the countries which have problems with each other. Also, the developed countries should cooperate with developing country, in order to support them in developing. I can imagine that the United Nations should work more, preventing the world from wars .The reason that ceasing wars could change the world, due to it will be less pollution as well. Finally, everyone in the whole world have to be responsible in ceasing wars, because anything happens will cause all people in the hug world.