Fundamentalists “separate” from society. Evangelicals “engage” with society.
Also, Fundamentalists tend to have roots deep in Calvinist thinking, whereas Evangelicals as a whole can be much more diverse.
A couple of notes from a insider, formerly Fundamentalist, now Evangelical…
Evangelicals believe in separation, too (even though most would never say that), but the difference is that Fundamentalists practice what I call “second order” separation while Evangelicals only practice “primary” separation.
What do I mean by that? Well… Neither an Evangelical nor a Fundamentalist group would really feel comfortable associating with a Liberal (theologically speaking) Mainline Protestant group like the United Church of Christ or the United Methodist Church or even the National Council of Churches. An Evangelical group, however, would have very little difficulty allowing a particular UCC or UM church that happens to find itself in agreement with the Evangelical bona fides; but, a Fundamentalist group would refuse, typically, to associate with one of those groups unless that group first disassociated itself with it’s liberal parent denomination.
A true to life example from my own area may be illustrative: A particular United Methodist church in my area happens to be pretty faithful to historical, protestant orthodoxy. Indeed, they are downright evangelical, even though they remain a member of a liberal denomination. The evangelical Alliance church that I used to be a member of had zero problem having shared prayer services and even participating in a kind of semi-integrated youth group that this particular UM church was hosting for other evangelical and more orthodox minded mainline churches in the area.
The one church that didn’t participate, however, was the local Independent Fundamental Baptist church. They used to participate with us on lots of things: We used to have shared baptismal services and revival services and so on, but the instant we associated ourselves with the UM church, they disassociated themselves with us. They did this not because they thought we were being “led astray” by the UM church. They understood full well that
this UM church was “one of the good ones.” They did this because they were concerned that others might see that we had associated ourselves with a UM church and thus think that we were endorsing the United Methodist denomination as a whole.
Another example: An Evangelical will read and even quote N.T. Wright from the pulpit because, while there are some issues we don’t agree with him on, he’s more or less a staunch defender of what Catholics and traditionalist Protestants would both agree upon as the essential historical truths of the Christian Faith: the Deity of Christ, The Virgin Birth, the Resurrection, and so on. A Fundamentalist would never do that because N.T. Wright doesn’t hold to the same narrowly defined definition of Biblical Inspiration and Inerrancy that we do. Even if Wright did hold to that very high view of Scripture, a Fundamentalist still wouldn’t read or quote him because he is a member of the Anglican Communion and so is John Shelby Spong, and if the Anglican Communion won’t excommunicate Spong, then
anything that
any Anglican says is immediately suspect.
To put it yet another way: A Fundamentalists believes and acts according to the principle that if a group is apostate, then all the members of that group are apostate and we are to have nothing to do with them. An Evangelical recognizes that a group may be apostate, but an individual may still be faithful and we will gladly associate ourselves with anyone who is faithful and try not to judge them for remaining in an apostate group. A Fundamentalist recognizes that one bad apple spoils the whole bowl while Evangelicals believe that every apple needs to be evaluated on its own merits.
In terms of Theology, I’ve never noticed a decided bent within Fundamentalism towards Calvinism. I can assure you that Calvinists were decided minority of my classmates at Bob Jones University, but the Calvinists that were there tended to be really, extraordinarily serious Calvinists, so that may be where the perception comes from. Yes, most of us (almost all of us) believed in Eternal Security (“Once Saved, Always Saved”) but the vast majority of Fundamentalists and Evangelicals believe in that and Eternal Security alone does not a Calvinist make.
If there are any solid theological distinctions that I can make, beyond the practice of Separation above, it would be these:
1 - Fundamentalists tend to be Baptists. Yes, there are Fundamentalists among the Methodists and Presbyterians and Lutherans, and believe it or not, Bob Jones his own self was a dyed in the wool, baby baptizing Methodist, and Bob Jones University to this day remains committed to a “generic” Fundamentalism that allows for such things; but, the vast majority of the students and faculty there are Independent Fundamental Baptists.
2 - Fundamentalists tend to be Dispensationalists. And I mean “Dispensationalist” not “Dispensationalist in their Eschatology and nothing else.” I mean full-on, hard-core, seven dispensations, the OT saints were saved by works and not by faith Dispensationalists. Even inside of Evangelicalism, most people don’t realize that Dispensationalism is about a heck of a lot more than just the timing of the Rapture. Fundamentalists do and they typically have really strong opinions about it, or at least they did in the IFB churches I went to and within the Religion Department at BJU.