Good and Evil

[Pyrrho]

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Is there anyway to define good and evil in an universal sense - a definition that everyone, from every culture, can agree on?

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First of all, that is an impossible standard; there is no way you are going to define those terms such that everyone will agree.  Not everyone even agrees that the earth is not flat (do a search for the "flat earth society").  So universal agreement is out of the question.


There is also a distinction to be made between cultural values and ethics, though not everyone agrees on that idea (as, indeed, not everyone agrees on anything).


I think Hume got it right:



The end of all moral speculations is to teach us our duty; and, by proper representations of the deformity of vice and beauty of virtue, beget correspondent habits, and engage us to avoid the one, and embrace the other. But is this ever to be expected from inferences and conclusions of the understanding, which of themselves have no hold of the affections or set in motion the active powers of men? They discover truths: but where the truths which they discover are indifferent, and beget no desire or aversion, they can have no influence on conduct and behaviour. What is honourable, what is fair, what is becoming, what is noble, what is generous, takes possession of the heart, and animates us to embrace and maintain it. What is intelligible, what is evident, what is probable, what is true, procures only the cool assent of the understanding; and gratifying a speculative curiosity, puts an end to our researches.

http://oll.libertyfund.org/titles/341#Hume_0222_335


Extinguish all the warm feelings and prepossessions in favour of virtue, and all disgust or aversion to vice: render men totally indifferent towards these distinctions; and morality is no longer a practical study, nor has any tendency to regulate our lives and actions.


http://oll.libertyfund.org/titles/341#Hume_0222_336


... Personal Merit consists altogether in the possession of mental qualities, useful or agreeable to the person himself or to others. 

http://oll.libertyfund.org/titles/341#Hume_0222_558


And as every quality which is useful or agreeable to ourselves or others is, in common life, allowed to be a part of personal merit; so no other will ever be received, where men judge of things by their natural, unprejudiced reason, without the delusive glosses of superstition and false religion. Celibacy, fasting, penance, mortification, self-denial, humility, silence, solitude, and the whole train of monkish virtues; for what reason are they everywhere rejected by men of sense, but because they serve to no manner of purpose; neither advance a man’s fortune in the world, nor render him a more valuable member of society; neither qualify him for the entertainment of company, nor increase his power of self-enjoyment? We observe, on the contrary, that they cross all these desirable ends; stupify the understanding and harden the heart, obscure the fancy and sour the temper. We justly, therefore, transfer them to the opposite column, and place them in the catalogue of vices; nor has any superstition force sufficient among men of the world, to pervert entirely these natural sentiments. A gloomy, hair-brained enthusiast, after his death, may have a place in the calendar; but will scarcely ever be admitted, when alive, into intimacy and society, except by those who are as delirious and dismal as himself.


http://oll.libertyfund.org/titles/341#Hume_0222_560



When a man denominates another his enemy, his rival, his antagonist, his adversary,he is understood to speak the language of self-love, and to express sentiments, peculiar to himself, and arising from his particular circumstances and situation. But when he bestows on any man the epithets of vicious or odious or depraved, he then speaks another language, and expresses sentiments, in which he expects all his audience are to concur with him. He must here, therefore, depart from his private and particular situation, and must choose a point of view, common to him with others; he must move some universal principle of the human frame, and touch a string to which all mankind have an accord and symphony. If he mean, therefore, to express that this man possesses qualities, whose tendency is pernicious to society, he has chosen this common point of view, and has touched the principle of humanity, in which every man, in some degree, concurs. While the human heart is compounded of the same elements as at present, it will never be wholly indifferent to public good, [273]nor entirely unaffected with the tendency of characters and manners. And though this affection of humanity may not generally be esteemed so strong as vanity or ambition, yet, being common to all men, it can alone be the foundation of morals, or of any general system of blame or praise. One man’s ambition is not another’s ambition, nor will the same event or object satisfy both; but the humanity of one man is the humanity of every one, and the same object touches this passion in all human creatures.


http://oll.libertyfund.org/titles/341#Hume_0222_563


But though reason, when fully assisted and improved, be sufficient to instruct us in the pernicious or useful tendency of qualities and actions; it is not alone sufficient to produce any moral blame or approbation. Utility is only a tendency to a certain end; and were the end totally indifferent to us, we should feel the same indifference towards the means. It is requisite a sentiment should here display itself, in order to give a preference to the useful above the pernicious tendencies. This sentiment can be no other than a feeling for the happiness of mankind, and a resentment of their misery; since these are the different ends which virtue and vice have a tendency to promote. Here therefore reason instructs us in the several tendencies of actions, and humanity makes a distinction in favour of those which are useful and beneficial.

http://oll.libertyfund.org/titles/341#Hume_0222_585


The hypothesis which we embrace is plain. It maintains that morality is determined by sentiment. It defines virtue to be whatever mental action or quality gives to a spectator the pleasing sentiment of approbation; and vice the contrary. We then proceed to examine a plain matter of fact, to wit, what actions have this influence. We consider all the circumstances in which these actions agree, and thence endeavour to extract some general observations with regard to these sentiments.


http://oll.libertyfund.org/titles/341#Hume_0222_592



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So, morality is based on sentiment (feeling).  But it is not every sentiment; it is taking a broad view, without reference to one's personal situation.  Hence the difference between describing something as a personal preference, and something that is good.  The second can be distinguished by thinking about things without reference to oneself.  Whether a man is cheated by a merchant in China, is likely to have little reference to or little affect on me personally.  Yet I still have feelings about this, just as most people do.  It is those kinds of sentiments that are moral sentiments, and the source of morality.