Morally Corrosive

"And “morally corrosive” is exactly the term that some critics would apply to the new science of the moral sense. The attempt to dissect our moral intuitions can look like an attempt to debunk them. Evolutionary psychologists seem to want to unmask our noblest motives as ultimately self-interested — to show that our love for children, compassion for the unfortunate and sense of justice are just tactics in a Darwinian struggle to perpetuate our genes. The explanation of how different cultures appeal to different spheres could lead to a spineless relativism, in which we would never have grounds to criticize the practice of another culture, no matter how barbaric, because “we have our kind of morality and they have theirs.” And the whole enterprise seems to be dragging us to an amoral nihilism, in which morality itself would be demoted from a transcendent principle to a figment of our neural circuitry.

Here is the worry. The scientific outlook has taught us that some parts of our subjective experience are products of our biological makeup and have no objective counterpart in the world. The qualitative difference between red and green, the tastiness of fruit and foulness of carrion, the scariness of heights and prettiness of flowers are design features of our common nervous system, and if our species had evolved in a different ecosystem or if we were missing a few genes, our reactions could go the other way. Now, if the distinction between right and wrong is also a product of brain wiring, why should we believe it is any more real than the distinction between red and green? And if it is just a collective hallucination, how could we argue that evils like genocide and slavery are wrong for everyone, rather than just distasteful to us?"

https://www.nytimes.com/2008/01/13/magazine/13Psychology-t.html