The family dissolves when the children grow up. This is its ethical dissolution. It is not a misfortune but its goal.

What happens?

The children come of age. They now count as legal persons in their own right. They can have property of their own. And they can found families of their own. The sons become heads of a family. The daughters become wives.

In the new family they now have their real vocation. The family they come from steps back. It stays their point of departure. The wider clan has no rights over them at all anymore.

Summary: The family fulfills itself when the children learn to stand on their own. They found families of their own. The family they come from steps back behind this.