There's dozens of theories about the origin of the bowie knife. After Jim died every bladesmith in the south and southwest claimed to have made the first one. The theories range from one published in 1861(maybe62) by Harper's that it was begun by a broken sabre Jim was using to fight off Mexicans, to a hunting knife that Rezin used to kill cows with. It doesn't help any that the Bowie bros., especially Rezin, commissioned several knives during their lifetime.
My opinion is, for what it's worth, that Rezin, or Jim's father also named Rezin, originally had a large hunting knife made by a local or resident blacksmith, possibly Jesse Cliffe. I think that story is most probable because there are several claims that go along the lines of that story. Rezin claimed he originally had a hunting knife made and it developed into a fighting knife through the work of talented bladesmiths. A cousin of the Bowies also made a similar statement.
There is no evidence that i've found that James Black made the first "fighting" bowie, or even started the use of the clip point on the bowie, though if his story is correct he would have probably been one of the bowie development pioneers.
Whatever the bowie started out as, it became the world's premier fighting blade and remains so to this day IMNSHO. The bowie's not a camp knife but a fighter. It has continued to evolve and IMO, again, Bagwell's Helles Belle is the current epoc of bowies.
My .02, take if for what's it's worth- not much
Regards,
David