What is the meaning of loving others?

fighting,killings,hurting are the result of hatred this can not lead the world to live peacefully.sometime gaining to conquer the world,for example in the second world war.Japan try to conquer some of the pacific islands,which caused a lot of pain.how this things can be put to end?who can make the world an enjoyable one by means of living peacefully to everyone?let us aim to make peace to our whole world.