If you are to establish a family, a system within it, an agreement, a dynamic, a family itself, the one rule, the beginning and the end, is unconditional love based on nothing.
If not, then don’t you dare use the word and defile this holy forgotten concept. Use team or company instead.
What if it fails? Well, it’s a company then so it seems, for such a questions is self contradictory.
And in fact when even the father is weak, let’s say absent in time of war, the son or daughter, wife or child weakened too, one or more may bear with love and with wisdom to heal the faults, the temporary absence, and shortcomings of the others.
God, I believe, is also a supporter of blessed families of the rule, the one rule: the law of love of no condition and based on nothing.
In fact, love is the daily bread of survival, it is the backbone of all function and life.