Population growth is a good thing for the world because it adds diversity to society, creates more responsible and moral citizens in the world, and it contributes to the maintenance of order in society.
Population growth is beneficial because it adds diversity to the world. Our society is more enjoyable when we're able to learn about the lives of people in different cultures. However, when certain cultures become extinct, we miss out on important life lessons we could get from them.
With some of our brightest minds dying each day due to tragedy or the natural aging process, it's important that the world has a new generation of people to ensure the morality of society. The world will always need people who have the integrity to to defend the rights of those who society sometimes ignores.
Population growth is also important because we need a new generation of people who can think big and create ways to keep society strong. When new babies are born, some may grow up to invent new technologies that can ensure safe food production methods for us.
As humans, we were designed with the need to enjoy healthy relationships. We may have the latest gadgets which allow us to communicate with each other, but it's not the same as a warm hug, a beautiful smile or a meaningful face-to-face conversation. This is why we need population growth.
Even if population growth includes those who are disabled or who are of a culture we do not like, we can learn to love them unconditionally and try to understand their situations because they too are blessings to the world.