Roger Olson, an Arminian, thinks that the heart of the Calvinist-Arminian debate concerns theological voluntarism. I think that it really does boil down to this, although I have run into arguments to the effect that Calvinists are not necessarily committed to voluntarism.
When I debated the issue a few years back with the people over at Triablogue (mostly) I thought they were getting away from straightforward voluntarism, but that their position ended up in something like it in the final analysis. I think Calvinists like to cast the debate as reliance on intuitions vs. reliance on Scripture, but can we have knowledge of moral truths in the Platonistic sense which permit us to form judgments about what is can be plausibly attributed to God, which in turn affects our understanding of what we take from Scripture?
When I debated the issue a few years back with the people over at Triablogue (mostly) I thought they were getting away from straightforward voluntarism, but that their position ended up in something like it in the final analysis. I think Calvinists like to cast the debate as reliance on intuitions vs. reliance on Scripture, but can we have knowledge of moral truths in the Platonistic sense which permit us to form judgments about what is can be plausibly attributed to God, which in turn affects our understanding of what we take from Scripture?