Perhaps you do not understand the mechanism behind evolution. Evolution follows a very logical path guided by the principle that a behavior that benefits mankind will survive. Anti-social or what we call "unethical behavior" could cause the offender to either die in an intense argument, or failure to find a willing spouse. Thus the unethical behavior is punished by failing to produce offspring.
Geneticists have recently observed that mutation of genes happens much more frequently than previously thought. In essence some humans are born with relatively evil tendencies, while others are born with more moralistic tendencies. In an environment where the ability to "get along" with your neighbors increases your chances of survival, the evil genetic mutation will be at a disadvantage.
The question that begs to be asked is, "if evolution tends to modify human behavior to become more moralistic, then why isn't the world a more peaceful place?" The answer to that is evolution is always a work in progress. Mankind has progressed passed the point where raiding a neighboring village to steal the wealth, kill the men, and take the women and children as slaves.
But the question of what is good and what is evil is not always clear. Look at the issue of torture at Guantanamo Bay. Clearly, from a moral perspective, torture should be labeled as evil. However, the counter argument is that torture performed with the intention of locating an even greater evil is justified.
Strangely enough mankind cannot answer this moral question using all of the powers of logic at his disposal. Yet, through some circuitous route and over time, one would suspect that mother nature will answer this question for us.
I think the events at Guantanamo Bay are being judged by all societies as being moralistically wrong. Opening the door to "morally-correct torture" will, in the future, cause much more suffering by innocent people than the occasional benefit can justify. One would suspect that that societies who practice torture must either change their ways or they will find themselves eternally at war and will eventually perish.
Whether that presumption is correct can only be answered by Mother Nature. Will using torture benefit the survival of a society, or will adverse reaction to using torture help cause the demise of a society?
