Os Guinness tries to explain how evangelicals view and use sociology:

CP: How are we as Christians failing to live the Way of Jesus?

Guinness: Sadly, when we look at many movements within evangelicalism today, the world and the spirit of the age are dominant, rather than the Word and Spirit.

I feel this very deeply as one trained in the social sciences. When I wrote “The Gravedigger File” nearly thirty years ago, very few evangelicals knew much about sociology. It was considered a “dangerous” field, along with psychology. Now it is cited almost universally, especially in the constant quoting of the latest statistics. I have heard mega-church sermons in which “Gallup or Barna says” far out-stripped “God or the Bible says.

But whereas sociology was once unused, it is now used uncritically. One of the key places where sociology should be used is in analyzing “the world” of our times, so that we can be more discerning. To resist the dangers of the world you have to recognize the distortions and seductions of the world. I have revised and updated my book under a new title, “The Last Christian on Earth”, but understanding the world through cultural criticism, as this parable encourages, is still unfashionable. Rather than use sociology that way, most pastors use it in a way that leads to adapting to the world, and they are encouraged to do so by half-baked versions of “seeker-sensitive” mission, and so on.

Guinness suggests sociology is used by evangelicals in several ways:

1. As a source of data. Several commentators have suggested in recent years that this data is often used in an alarmist way and to rally people to a particular cause or way of thinking. See an example here.

2. It is used by religious leaders who are trying to adapt or connect to culture rather than critique or understand culture.

From what Guinness is saying, it sounds like evangelicals are taking what they want from sociology rather than engaging with some of the bigger ideas and methods of the discipline. This seems to fit with the pragmatic culture of evangelicalism that is always looking for ways to reach the broader culture without thinking everything through.

I would also argue with the suggestion that sociology is no longer viewed as “dangerous” by many evangelicals. They may hear sociological snippets at church but I think there is still a decent amount of resistance and more so than psychology.