They faced every aspect of the war and greed in this land, the people. They are used to fire, smoke, bombs and someone to watch their windows.
So the families expanded as a mixed Asian history in such a cold way.
The effects of the nuclear accidents and ignorance of the leaders became something could be ignored in daily life. So the people made peace with the world as it can not be differ by their choices.
So people left behind the emotions related to the world and they dreamt about their families. Everything else became only accesories to it.
The memories stoped to hurt them and became a study to protect the family.