Making others happy is not a question of sacrificing our own happiness. Trying to make others happy, even when we do not always succeed, is a source of great satisfaction. Anger and hatred are signs of weakness, while compassion is a sure sign of strength.
I am one of the 7 billion human beings alive today. We each have a responsibility to think about humanity and the good of the world because it affects our own future. We weren’t born on this planet at this time to create problems but to bring about some benefit.