So these are the kind of things that now when people are trying to move towards multiracial congregations that they're stressing. They're talking about these scriptures that say we ought to come together, and that at Pentecost, when that the Holy Spirit is said to have come upon the first Christians, they were given the ability to speak in different languages, and so that no matter who the people were, they could all worship together.

Downsides, yeah, and when there are more downsides when churches first start - they go through stages of transforming to becoming multiracial. So in the beginning stages there's often a lot of pain, a lot of confusion, a lot of people leave.

So it may be a language that separates you - again, social networks. But second-generation Asian and Hispanics, second, and third and fourth and so on, they are much more likely to be in integrated churches than are blacks or whites.

I think with President Obama there's going to be a discussion, because he himself is multiracial, because we have for the first time a non-white president. There's going to be talk about what does this mean? What is it? Are we in a new era?

I think it's pretty dynamic. There's a lot of energy there and life, and you'll have women dressed in their traditional African dress when they come, and you have people from all over the place, and some people have headphones on because they're listening in Spanish.

There are three things, and it depends on the group that we're talking about, but there's history, there's culture, and then there's social networks. So, you know, historically black and white, they worship together until about the end of slavery, and people started moving out into separate churches. But it was because of discrimination and racism and such that blacks began to establish their own denominations and their own churches.

I spent a lot of time developing in books why worshipping separately actually impacts inequality, economic, social, on and on. So I really do believe there are huge advantages to being together even though it's difficult, even though we have a lot to learn.