Dr. Christof (Christoph) Koch

that people had 10 kids.

Okay, well, it doesn't happen anymore.

I mean, our generation was more like two to four kids.

Now it's very common.

Many families have no kids or have one child.

In China, most extreme.

China, there are three generations where they had...

single child.

That means no siblings, no cousins, no nephews, no uncles, no aunts.

You just know those from books, from abstract representation, but nothing in your experience.

So this is the first in human history, and we don't really know what that does.

What does it do when there aren't any siblings around to play or to interact with for good or for bad?

Well, what does it do to the human psyche?

No one does that research, but I think it's an extremely interesting question.

Yeah, imagine zero sibling.

And that's the fact of life.

Well, certainly in all the Asian, in many of the Asian countries, you know, in Korea, their birth rate now is 0.7.

There was this recent New York article where they described going to a school and there were like three or four kids in this entire immaculate school.

On the one hand, it's great because women, you know, women can decide not to have children, of course.

And so it gives them more freedom.