I’m not talking from a religious standpoint here, but from a completely biological, “Law of Nature” standpoint.
Known Laws of Nature for Humans and Animals:
1. Survival
2. Breeding
Can it be assumed a person, or animal for that matter, only has two known objectives (see above) in life in order to live in accordance to the laws of nature?
Breaking the Laws of Nature:
Birth Control (failing to breed)
Homosexuality (failing to breed)
Suicide (failing to survive)
Etc.
If this is the case wouldn’t preventing those objectives (see above) be seen as the only tangible evidence of immoral behavior?
More to the point wouldn’t things that preserve those objectives be seen as your moral duty or rights?
For example: The right to kill someone attempting to kill you or others. The right to kill animals in order to provide food.