They report a dramatic decline in fertility, with effects on family life and civic culture.

The other reason is a product of civic culture.

We have a civic culture here, but it is very thin.

And a strong civic culture must be welcomed into Europe's home.

"I worry a lot about the fraying of the civic culture, but we have to understand that is going on around the world," he said.

Those who choose to come here must embrace the common core of American civic culture.

The civic culture may be weakened but it has not collapsed.

"It may be that the civic culture is really different in those areas."

The comparison reflects the degree to which diversity is a part of the civic culture here.

The implicit question that the agency has raised seems to be no less than, what is civic culture?