Read excerpts from Bob Abernethy's interview with Martin Marty:On describing the central ideas of Protestantism:
The easiest way to do that is with a little chart: God on top. God comes through Christ, revealed through the scriptures. All Protestants (if they're Protestants) believe in God. All of them believe God reaches us through Christ. All of them somehow relate to the scriptures. And they believe that God's basic action to us is undeserved grace. The other Protestant idea is equal standing before God -- all members. There's no pope or hierarchy closer to God than all members. And equal obligation to and privilege to minister, to serve. You have functions, offices, and you give different reasons for following them. But in Protestant belief -- equality before God and freedom. All Protestants will say that they experience the grace of God through Christ, and they learn about it in the scripture. They interpret scripture in different ways, but it's always God's undeserved grace that makes them equal before God. Clergy and laity are all called to be ministers, [but] all [are] free to be ministers, which means to serve others.
On softening beliefs and the importance of religious experience:
There's great suspicion of ideology in the modern world. We've known fascism, communism, all the other isms. People are also suspicious of dogma, doctrine, stipulated rules. It doesn't mean they disagree with them. It's just that they aren't so moved by them. They're moved by story. All over the world Protestants are moved by the stories of Jesus -- the Good Samaritan, the Prodigal Son. But they don't only want to hear that 2000 years ago, interesting things happened. They want an experience of it now. And they share with almost all people in the world today that impulse to have experience. If beliefs are less important than experience, it means that no religious leadership can crack the whip and say, "If you don't believe these things, you're out." You can, with a small denomination, do this; you can enforce it. But there's always another place to go in Protestantism. Experience can't be checked out so clearly. How do I know the authenticity of your experience? I have to trust you.
On mainline Protestantism:
The mainline is healthy in many tens of thousands of local bases, but it doesn't have a single national profile any longer. For one thing, it used to get its profile because it was anti-Catholic. It isn't that anymore; [it] doesn't have that enemy. So you get into individual local churches -- hundred-member churches, thousand-member churches. That's where the pulse is. That's where the vitality is. [Mainline Protestantism] suffers from the fact that, as one sociologist said, "You won." So much of what it stood for became part of the larger culture, whereas if you are a fundamentalist or a conservative Catholic, you really stand apart from the culture.On rising numbers of evangelicals and Pentecostals:
It hasn't changed much from 1950, as far as how people identify themselves is concerned: 25% Catholic, 25% mainline Protestant, 8% African American Protestant, 25% evangelical -- but it is the evangelical and Black sector (evangelical including Pentecostal, fundamentalist, Southern Baptist and so on) that has surged. In part it's because they minister so much to the theme of experience. You just don't have the old stories without your getting it, and then you have to tell somebody else about it. Most in the mainline took for granted that their children would follow them in their faith, and they didn't.
On loosening denominational ties:
Protestantism was born all over Western Europe, and religion came with your genes and your turf. If you were Scottish, your children would be Scottish Presbyterians. If you were Swedish, your children would be Swedish Lutherans. If you were Dutch, your children would be Dutch Reformed. Today, geography doesn't mean much; we're all over the place. And genes don't mean as much, because there's a good deal more freedom. Mom and Dad can't drill it into you. You rebel. You go off to college. You watch television. You meet friends. You go to that mega-book store. You pick up all these ideas. You don't have inherited loyalties; they have to be won.
On denominational mergers:
Formal mergers are very few. The whole twentieth century talked ecumenism. In American Protestantism you really have only one or two [mergers] -- the United Church of Christ, where you went across family lines; the others were the Presbyterians getting their house in order, the Lutherans getting their house in order. So merger is not big. People want to keep the integrity of what they're about. The key word for most of what's going on now is "full communion." [People] would like to be present at the sacred rites of the other fully, equally, and to share ministers and ministries. That's quite healthy. That's moving along quite significantly.
On how Protestants choose a church:
Most people start out and the majority ends up in the faith in which they were brought up. They may test it. They may transform it. They may have different ties to it. But if you're born Baptist, you're likely to stay Baptist. The biggest change comes about in mixed marriages. If you marry someone from another denomination, normally if you're both Protestant, you're going to end up in one of the two. Here a number of things come in: the personality of a pastor; the greeting at the door; the social program (great numbers of Protestants want to serve the homeless); the music; the location, the parking lot. There are a thousand things. But over the long haul the test is, does it speak to my mind and my heart? Is this an authentic experience of God, and does it make sense to me?
On religion and class:
It's a big marker in American religion, even though every Protestant group is -- on paper and in [its] heart -- democratic. They would like to include everybody. But somehow people do their own selecting.
On being a Protestant and an American:
Protestantism is the wallpaper in the mental furnishings department in which America lives. When you go back to the founders of the nation, they were reasonable sons of the Enlightenment. But they were all Episcopalian, Presbyterian, Congregational and so on, and that got so stamped in our culture. A century later, when modern industry and capitalism came along, they were all Protestants running the show. It got so fused with the environment that you don't have to be Protestant to seem Protestant. No matter who comes to America, they take on that style. If I go to Honolulu, I go to a Buddhist church. That's an oxymoron in Japan. But the Buddhist church has pews, it has an organ, it has envelopes for offerings, it has charity drives, it looks just like the Presbyterians down the block. So you can't really escape it. Some scholars, like Kwame Anthony Appiah, say people want to be white Protestant; many of the features of the mosque and the Reform and Conservative synagogue take on that color. It's just part of the life around you. Protestants had a headstart. They've been here 400 years. They have had overwhelming numbers through all the history.
They only began to share space after three of their four centuries here. And with all that as a headstart, they could bond with the environment; they could shape it. They helped pass its laws, they helped found it in the Constitutional era, they helped give impulse to its businesses. Slaves became Protestant, with their own stamp on churches called Methodist and Baptist. There's a [Protestant] style that just pervades. Partly it's competitive. Partly it's an impulse toward freedom and individuality. But you just cannot tear the two apart. You live there if you're an American. You would have to begin with the central idea of Protestantism, that is, a gracious God. And that means that God is not going to devastate you. There's a strong sense that you can be forgiven and start over. Today, Catholics and Protestants sign documents saying they both believe in that; they fought about it five centuries ago. All the religions know they can't get anywhere just with hellfire and damnation and a punishing God: [it is] grace, grace, grace. We're a scripted nation. The forefathers and founders of the nation would even read the Bible and say we're pilgrims, we have Zion, a city on a hill -- our presidents still invoke that. That all came from a Protestant reading. Protestants aren't always faithful to that vision, but it means that others are going to catch it from them, too.

But there's very little instinctive response to particular forms of it, as there was a century ago. We should be watching the glacier carve a slightly different landscape all the time. It will keep moving. There will be changes. There might be global warming, if you will, that heats up religion. There might be new ice ages that freeze it a little bit. But that motion on the larger landscape is very constant.