Churchland is a proud Humean who believes in obeying your natural sympathies and checking them as you go against the imagined perspective of an impartial observer. She favors this approach over the available alternatives on the grounds of evidence, pragmatism, and even, implicitly, ethic...Still, as a basis for doing philosophy per se, it has some obvious difficulties. You can accept that there’s a biological substrate to any given aspect of the human condition without assuming that more information about the brain will meaningfully deepen your understanding ... it seems uncontroversial to suggest that you can glean more about what it means to live and think by reading Ulysses than you ever could by shoving James Joyce inside an MRI machine ... The test of a moral philosophy is surely not where it begins so much as where it leads, and here the results are mixed. As Churchland admits, a system based on the glow of social approbation and affection versus the shame and pain of their inverse is vulnerable to all kinds of abuse. ... The severest dangers of essentializing in this way are obvious. Yet there are also other, subtler risks.
True, as Ms. Churchland would say, even though we know a Monet painting is made up of chemicals, that knowledge doesn’t stop us from valuing its artistry. But we don’t, at the same time, view the pleasure we get from such artistry as a mistaken theory, a mere folk explanation for the work that chemicals do. Nor do we root the Monet’s value—say, its emotional power—in the way it generates oxytocin ... Ms. Churchland’s previous books have advanced a potent philosophy of the human mind. But it falls short in explaining the cherished human values we choose to designate as moral.
How, [Churchland] asks, do individuals develop a sense of right and wrong? To what extent is conscience shaped by the social world? What accounts for similarities of cooperation and sharing in human behavior? What accounts for psychopathology and for the disdain for honesty, kindness, and decency displayed by some celebrities and politicians? No discipline provides a complete answer to these formidable questions, but Churchland gleans insights from all ... A thoughtful, accessible, and enlightening book.