No - after the flood, man was given permission (or even commanded) to eat meat, and antagonism was set between man and beast. In Eden, carnivorous behavior was against the natural law, but, after the Fall, God killed beasts to make clothing for Adam and Eve, prefiguring the need for blood sacrifice (that’s what Jesus is, you know - a blood sacrifice. Jesus wouldn’t work in a vegan culture). For the time between the Fall and the flood, it seems that it was still wrong to eat meat, or do anything other than sacrifice it to God Most High. After the flood, as I mentioned above, antagonism was set between man and beast, and it is commanded that man will now have the beast of the earth as well as the grain of the field to eat for sustenance.
No amount of human reason can ever contradict Scripture. If the Bible said, “thou shalt contracept whenever thou goest into a woman”, our human reason could not abrogate a command of God. The Bible, however, does make clear statements on homosexuality, and abortion, and coitus interruptus: it makes no direct statement on hormonal contraception, so human reason must be used to discern the will of God.
In any case, humans are not naturally vegetarians - **one only need look at the teeth **(regardless of the mountains of other evidence, psychological, biological, medical, anthropological) to see that humans are omnivores. If we were herbivores, we’d have all molars, if we were carnivores, we’d have all incisors and canines.
Simply:
Carnivorous behavior is permitted by or commanded by God after the flood, prohibited before the flood.**** N Veganism is condemned by both God’s word and natural law.No natural law argument can or does claim that eating meat is a moral wrong (**
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Homosexuality is clearly condemned in many Biblical passages. Natural law can be used to augment this understanding, but not to overturn it or abrogate it. Human reason can never be placed in a position of superiority to the words of God (much like the Magisterium can never teach something that contradicts the Bible, but can expand on it and explain it and elucidate it).
Abortion is condemned in the Bible. Ditto.
Coitus interruptus, the only known method of birth control to the ancients, is condemned. Ditto.
Other forms of birth control are not mentioned. This is the place for human reason and natural law, and analogy to the things that God has commanded - only to discern God’s will when an unambiguous command has not been left in his written word or his living tradition.