If you're pro-life, how far do you take that?

[Aroura]

I'd like to bring this point up again though: laws are about what is best for society, they are not about judging what is and isn't moral.

Devil's advocate here. 

Sure, laws against murder help to keep and maintain order. If you could simply kill someone for pissing you off, you could cause a fair amount of disorder. Permitting everyone to kill others for whatever reason they wanted would be utter chaos.

But that's not the whole story. Laws are enacted to enforce a moral code, too.

If a society were to enact a law that allowed parents to decide if they wanted to kill their children at age nine, one could argue that the society could still run smoothly with such a law in place. Hell, it might even be of benefit, weeding out some of the more ornery little shits before they could cause real damage

What about killing a disabled homeless guy with no friends or family? It could be argued that society is impacted little by such a deed. Still, it seems wrong to permit such an action.

The point is, we don't permit murder for moral reasons. Murder is illegal for reasons other than its possible adverse affect on an orderly society.

I would disagree. Chicken and egg here. We don't permit murder because it causes harm. We call it amoral once we decide it does indeed cause harm.

We call murder amoral, and have laws against it, because it causes harm; both individual harm And societal harm. We don't call it amoral just for shits.

It cannot be argued successfully that unnecessary harm is to be accepted. If it were, then we would see that more often. As a matter of fact, we do allow some killing. When? When we agree the benefits outweigh the harm, or when it is necessary to prevent further harm. In self defense, defense of others, and war (though there may be less agreement on this last point).

This essentially comes down to, how do humans determine what is moral? The answer: what causes unnecessary harm. I think that most pro choice people will admit that abortion causes harm. But much like killing in self defense, it causes less harm in the long run than the alternative.

Case in point. Notice the main arguments against gay marriage mostly focus on if its harmful. Is it hurting society? Ruining children? Destroying hetero marriage? Causing disease? And where people stand on the issue largely comes down to if they think the answer is yes or no.

Please, name one reason we outlaw murder aside from the harm it causes to individuals, and therefore the societies those individuals live in.