Rules-of-thumb are handy, in that they let you use a solution you've figured out beforehand without having to take the time and effort to re-derive it in the heat of the moment. They may not apply in all situations, they may not provide the absolutely maximally best answer, but in situations where you have limited time to come up with an answer, they can certainly provide the best answer that it's possible for you to come up with in the time you have to think about it.
I'm currently seeking fairly fundamental rules-of-thumb, which can serve as overall ethical guidelines, or even as the axioms for a full ethical system; and preferably ones that can pass at least the basic sniff-test of actually being usable in everyday life; so that I can compare them with each other, and try to figure out ahead of time whether any of them would work better than the others, either in specific sorts of situations or in general.
Here are a few examples of what I'm thinking of:
* Pacifism. Violence is bad, so never use violence. In game theory, this would be the 'always cooperate' strategy of the Iterated Prisoner's Dilemma, and is the simplest strategy that satisfies the criteria of being 'nice'.
* Zero-Aggression Principle. Do not /initiate/ violence, but if violence is used against you, act violently in self-defense. The foundation of many variations of libertarianism. In the IPD, this satisfies both the criteria of being 'nice' and being 'retaliating'.
* Proportional Force. Aim for the least amount of violence to be done: "Avoid rather than check, check rather than harm...". This meets being 'nice', 'retaliating', and in a certain sense, 'forgiving', for the IPD.
I'm hoping to learn of rules-of-thumb which are at least as useful as the ZAP; I know and respect certain people who base their own ethics on the ZAP, but reject the idea of proportional force, and am hoping to learn of additional alternatives so I can have a better idea of the range of available options.
Any suggestions?
Agreed: my take on virtue ethics would be that you are following your image of 'the good man', not trying to find out empirically what some specific good man did. So people can ask 'What would Jesus do?' and if they found out Jesus was actually really mean it shouldn't change their ethics. For what it's worth, I think Aristotle and Hume are both genuinely worth reading on this sort of thing: they've got some very useful folk-psychology insights. Though anyone who's seen how much this community uses the essentially Aristotelean concept of akrasia shouldn't be too surprised by that.
Another slightly differnt take (don't know if it's been identiied and named in academic philosophy) is the principle of transparency/scrutiny. The idea 'assume you're being watched' obviously exists in lots of religious contexts and can come in neurotic forms. But the principle that you should act as if all your actions are open to scrutiny has been suggested by various people (Zen teachers and Stoics amongst them, I think), and has some merit.
Professionally, as a civil servant, I actually rely to some degree on this. The fundamental codes of good practice when dealing with external bodies (papers, powerful trade bodies, political groups, the public...) are often best delivered not through attention to the minutae but by asking 'how would this look if it was subject to a Freedom of Information request?' Similarly, you can shortcut internalised excuses about a convenient decision that you know isn't really justified if you ask the question 'What would happen if this went to judicial review?'
The benefit of this approach is that it's not only a rule of thumb you can apply at the time, but a pricniple you can develop by logging when you've been uncertain of how to act and making a habit of actually opening the decision to scrutiny by others (a trusted friend, a rationalist community...) Knowing that it will be actually scrutinised makes it harder to try to push through a decision in your own mind, ignoring the objections that arise. It might also make it easier to take decisions that seem dubious but you truly believe are justified.
PS: I first thought of the actualy scrutiny idea in quasi-ethical contexts of personal goals. Decisions on whether a strict revision routine or diet can be interrupted by the exceptional circumstances of the Best Party Ever or the birthday cake your loving mother just made are not reliably made by the motivated individual involved. Submitting to external judgement on what's justified would lead most people to a more realistic assessment of what's a good reason and what's just an excuse.