James Smith has an interesting, though I think debateable, post over at the Immanent Frame. He claims to be offering a theological reason why a sociological definition of evangelicalism should be prefered.
The argument amounts to:
1) theological definitions of evangelicalism can be too narrow (so, emphasise the division with Catholics).
2) theological definitions can be too broad (so, include Pentecostals). Smith talks of 'the demographic sleight of hand that enfolds Pentecostals, charismatics, and the explosion of “world Christianity” under the label “evangelical.” '
To which I say, 'well, perhaps, but neither of these constitutes an argument against the use of the term evangelical as a theological definition per se. If some people want to misuse the term then it is certainly worth discussing. But it just doesn't follow at all that the whole business of theological definition should be given up as a bad job. (This, by the way, is what Smith says is a 'theological argument' in favour of a sociological definition...)
Smith's suggestion is that 'evangelical should be seen to represent a tone. So, he says:
'evangelicalism represents a contingent style, a sort of accent within Christendom'. Yet, when he describes this accent or tone, Smith is (it seems to me) full of contempt for it:
It is a distinctly modern, post-Reformation configuration of Christian discipleship that engendered practices and institutions which closely mirrored the development of what Charles Taylor describes as “the modern social imaginary”—a focus on individual salvation, a valorization of the autonomy of the local congregation, an entrepreneurial spirit that fueled ambitious programs of church and parachurch expansion, a kind of Christian materialism that generated its own markets, and other distinctive features.
In effect, Smith denudes evangelicalism of its theology and reduces it to a set of practices... which is the way all sorts of post-liberals are reading doctrine/theology these days...and why so many young American Protestant thinkers have recently become Roman Catholics perhaps.
There's more to say, but enough for now.