It's about integral development (do you know what that means? Intellectual, moral, including the development and honing of the human will to do the good, spiritual, emotional, etc.).

Primarily as the pope points out:  The family's job.

The entire world exists to serve the family, even the Church. 

All businesses exist to serve the family.

Government exist to serve the family.

The material laws...gravity...exist to provide a stable, predictable world for the family. 

The primary job of the family is to develop souls to do God's will.