Every architecture reveals its strength under pressure. The same is true of families. Their happiness is not a mystery of mood; it is a function of structure. When the lines of daily life—Boundaries, Bonds, and Legacy—are strong, a family's well-being can be felt, even measured. Psychologists might call it relational health, sociologists might call it social capital, but families know it more simply: peace at the table, laughter that lasts, children who trust the world because they first learned to trust at home.