In my experience, what we need is a calm mind and warm-heartedness provides a basis for that. That's how we make ourselves happy as individuals in families, local communities and nations. If we can train those who are young today in these qualities we’ll create a happier world.
When affectionate relations exist between members of a family, each one is confident of being able to call on the others for support. In a similar way, we must constantly remind ourselves of the oneness of humanity.