Tom Butler said:
Some non-successionists have excluded such groups as the AnaBaptists from our heritage, as well as some others, basically blowing them off as weirdo cults.
Well, some of the Anabaptists
were "weirdo cults."
Anabaptist was applied to any number of sects and movements united theologically by a requirement for adult baptism. They ranged from the violent millenialists of Munster to the pacifists who followed Menno Simons' example.
Now, it is my opinion that Anabaptist thought did flow into the English Baptists, whether directly or indirectly. However, that only takes us back to the early 1500s - if you will look at the leaders of the early Anabaptists (Simons, Hoffman, all came to the Anabaptistic faith
after Luther, not before.
This is not to say that certain features of Anabaptistic doctrine (or Baptist doctrine or Protestant doctrine) did not exist before the Reformation; they certainly did, as exemplified in the Hussites or Lollards.
Some of them, such as the Montanists and Novationists, were also pilloried by the Roman Catholic Church as heretics.
Well, we know very little about what the Montanists actually believed and practiced. The Montanists left almost no record (save the works of Tertullian, abbreviated as they are) and even the Roman Church preserves very little record of their supposed heresies (with some sources considering them not heretical but only schismatic.)
The Novationists, on the other hand, appear to have had little difference with the "orthodox" except on matters of discipline.
Are there groups that you would accept as part of our heritage, even though they may not in your view be thoroughly Baptist?
My conception of Baptist origins is that of a broad river into which many tributaries feed. There were many such tributaries that were undammed by the Reformation, and they flowed into what became Baptists. I don't think you can conceive of the English Baptists, for example, without the influence of the Puritans and Independents.