Nuclear didn't describe families. How could it? Dry physics was not equal to that task. In the twentieth century we needed a biological metaphor, Darwinian in scope, to suggest the gnash and crash of carnivorous life in the family gene pool. But for the 21st century, the new century, I think the metaphors must be chemical. Molecular. In the molecular family people are connected without being bound. They spindle themselves around shared experiences and affections rather than splashing in the shared gene pool.