Cross posted from Overcoming Bias. Comments there.

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I would like to think I wouldn’t have been friends with slave owners, anti-semites or wife-beaters, but then again most of my friends couldn’t give a damn about the suffering of animals, so I guess I would have been. – Robert Wiblin

I expect the same friends would have been any of those things too, given the right place and period of history. The same ‘faults’ appear to be responsible for most old fashioned or foreign moral failings: not believing that anything bad is happening if you don’t feel bad about it, and not feeling bad about anything unless there is a social norm of feeling bad about it.

People here and now are no different in these regards, as far as I can tell. We may think we have better social norms, but the average person has little more reason to believe this than the average person five hundred years ago did. People are perhaps freer here and now to follow their own hearts on many moral issues, but that can’t make much difference to issues where the problem is that people’s hearts don’t automatically register a problem. So even if you aren’t a slave-owner, I claim you are probably using a similar decision procedure to that which would lead you to be one in different circumstances.

Are these really bad ways for most people to behave? Or are they pretty good heuristics for non-ethicists? It would be a huge amount of work for everyone to independently figure out for themselves the answer to every ethical question. What heuristics should people use?