@RealEyes,
"That's not entirely true. In terms of a goal (economic efficiency of a society lets say) there are clear behavioural patterns which aid or degenerate progress towards that goal. A code of ethics is a promoted behaviour-set designed to best meet the desired end result.
Emotions aren't necessarily a factor in ethics."
Why do we *care* whether or not a country is economically prosperous? The desire for a certain end result is emotional, not logical. We use logic to achieve our goals but our goals are emotionally based.
'Pleasure' can be used as an umbrella term for all positive, desirable experiences. It's a misconception that 'hedonism' is just a selfish lust for sensual, physically based pleasures. If I'm not mistaken, the early hedonists made no distinction between pleasure and happiness, the idea that the two were separate was promoted by J.Stuart Mills who looked at Bentham's hedonism as a 'pig philosophy' (because he viewed human activities like a love for poetry or intellectual discourse as more valuable than the pleasures we share with 'lower' animals).
People do not always avoid stress but an aversion to stress (as well as a desire for pleasure) is the basis of all decisions. We have positive attitudes towards negative experiences because the *idea* of these experiences can be appealing to us, even if the actual experiences are not, or we tolerate them because they lead to long-term happiness.
There is a difference between cognitive empathy (intellectually understanding another person's emotional state of mind) and affective empathy (actually identifying with it, affective empathy is a form of love). I was talking about affective empathy. As for the two brothers scenario, I think a lot of times when we hear about someone being victimized in some way, we identify with their sadness out of love for them but empathy isn't the only response we have to the situation. We're also angry with the victimizers because we've logically analyzed their behavior as wrong (not to mention that we seem them as a threat to our well-being, since they'd probably behave the same way towards us) and we like to think that this anger has to do with our empathy for the victim but I don't think it actually does, even if it's the result of that empathy. As primates, we're hardwired to want to punish people for breaking the rules or behaving inappropriately but if we based ethical decisions on empathy alone, revenge would become obsolete since our concern would be the suffering of the victim and not punishing the victimizer, since we'd have empathy for the victimizer as well.