I like both, otto, as it gives amore complete picture when you look to why and how. And, as I said, looking to one will open more questions up about the other.
I find it interesting that many of the OT laws about what was kosher and what wasn't can be ascribed to the reduction of disease and/or poisoning. For instance, because the understanding of cleanliness was basically "I don't see anything so it must not be dirty" prior to the invention of the microscope and the discovery of virii and bacteria, the idea of not cooking certain foods in the same pans and not eating certain types of animals made sense. The rules seemed arbitrary, but pork, if not cooked thoroughly, is one of the worst meats for food-borne illnesses. 6000 years ago, men couldn't conceive of the microscopic world and so suddenly all animals that had certain similar traits were also classified as unclean. But this religious law came about because, even in that primitive state, mankind was able to see a trended pattern to illness and pork. Undoubtedly, there was some charletain/wise-man who, knowing his people would only listen to superstitious nonesense, said he had a vision or a message from God and that God said these animals were unclean.
Too bad the Romans didn't see that same correlation between lead lined dishes and their own infirmaries. But then only the Romans would view bulemia and gluttony as a good thing and create a room just for the bulemics/gluttons to go puke in.