In part because they had no choice, right? If you were a slave, you did what the master said. And they said to worship: "You're going to worship with us."

I never meet a church that wishes they didn't do it. I never meet a leader that wishes they didn't do it. They will all say, to the person, it's hard. It's difficult. It comes with complexities and confusion as you're trying to go across cultures, and you don't understand, you didn't mean to offend somebody but you've offended somebody. But they will all say it just does something.

I see it happen in uniracial congregations all the time. But people - when they're in mixed company, we speak differently.

Life will be simpler when I don't spend two-thirds of the year in the middle of the Pacific.

We're going to see more, and we are seeing more, and I'll tell you exactly why. Not because white and black are more likely to get together. Only a third of the seven percent of congregations that are interracial are black and white.

There's one denomination in particular, though, that has pushed very hard to be multiracial in its denomination - not only its denomination but, I mean, in its congregations, and it's called the Evangelical Covenant Church, http://www.covchurch.org/ which is headquartered in Chicago. Their whole goal is that's the kind of churches they start, multiracial, and I think they say now 20 percent of their churches are that.

So one of the profound things we found when studying these congregations, the mixed ones, is just how much overlap and interracial ties that develop not only with the people in the congregation, but they start meeting each other's families, and their friends, and they go to each other's neighborhoods if they live in different neighborhoods, and at work they meet people they wouldn't otherwise met, and so it creates a whole new definition of what the group is.