How do we know if something is right or wrong?

Yesterday the post about abortion pointed out that there is nothing immoral about a pregnant woman getting an abortion.  How can we know?  How do we know if anything is right or wrong?

The usual ways, such as how we feel about it, or what we've been taught by our religion, or what is legal, or what our conscience says, or what is traditional, while they all usually get it right and should therefore be thought about, in the end just do not work.  I don't know that it's necessary for me to go into all that -- they just don't work.  We need to have a rational basis for saying something is wrong, immoral.

Of course anything that happens has both right and wrong about it.  A volcano killing people is wrong, a volcano letting off pressure and fertilizing the soil and building land is doing right.  A lion killing its prey brutally and causing it a suffering, fearful death is doing wrong, a lion culling the herd and keeping it from ruining the environment and so on is doing right.

We don't make moral judgments in such situations because we argue doing good or causing suffering are not at issue -- volcanoes and lions cannot make right and wrong assessments and hence are not held to account.

Actually the same applies to people.  We may think we make our own decisions, but this is rarely really the case.  Most people act automatically according to instincts and personality and other factors and never really make a moral decision, although they could and in many cases where the decision is truly difficult they are forced to.

Therefore we can judge what others do no more than we can judge a volcano or a lion.  We don't know that they have actually made a conscious decision to be immoral, and if we think about it we know that is unlikely (although of course definitely possible).  We don't know the whole story and therefore cannot judge.

But we can judge ourselves.

Most of the time, presented with a moral question (a real one, not a hypothetical), we can see pluses and minus and have to decide whether the good outweighs the bad.  It turns out that some things are more wrong than others, even though both are wrong.  It depends on the suffering and harm we cause.  Lying to the Gestapo strikes me as harming the Gestapo, but almost certainly by making their job more difficult, and so is the thing to do, and rationally in that case telling the truth is morally wrong.

Of course this is a simple, if not simplistic, theory of ethics, but it has something to say for it that the traditional ethics don't have -- it is rational.  Do the good aspects outweigh the bad?  Most of the hypothetical situations people use to object to this depend on our gut feeling or one of the traditional tests to raise questions.  I think that is the wrong way to proceed.  That we don't like an outcome is not a rational basis for a decision.

There are however a couple of serious problems with it.  The first is the ability we have to fool ourselves and rationalize the goods as exceeding the harms when in fact this is not so.  The other is how do we know we have all the facts when in fact we know we surely don't?  Ain't easy, but if one is serious about being an ethical person the effort must be made and a decision must be reached.