From David Pearce (As with anything he writes, you may want to read it two or three times. It's worth it.): "The depressive realism of the serotonin-depleted and jaded cynicism of the chronically world-weary are often justified. Yet our descendants may recognize that we are the sociopathic emotional primitives in the grip of an affective psychosis. Jealousy, envy, resentment, ridicule, hate, anger, disgust, spite, contempt, schadenfreude and a whole gamut of nameless but mean-spirited states we undergo each day are a toxic legacy of our Darwinian past. More commonly, perhaps, our genetic make-up ensures we simply feel indifference to the plight of all but a handful of significant others in our lives. Right now, for instance, one knows dimly at some level that there is frightful and preventable suffering in the world. Yet most of us feel no overpowering moral urgency to do anything about it. Idealists might vaguely entertain the second-order desire to care more deeply and give, say, a larger proportion of one's money to Third World charities dedicated to those who need the resources more urgently than we do. Yet the biological roots to sustain 'saintly' self-sacrifice just aren't there in most of us. In contrast, taking MDMA can give rise to a prodigious sense of compassion in even the otherwise morally inert. Regrettably, such compassion is usually ineffectual; it's too short-lived to do much good. If and when we understand the neurochemical basis of empathy, however, then sustaining the molecular substrates of empathetic love can turn boundless compassion into an automatic reaction to distress, not a sign of drug-induced psychiatric disorder. Intervention can go further. If we decode and opt to amplify the molecular machinery of volition too, then such heightened compassion can be translated into effective action.
Fortunately, compassion if not empathy for others may ultimately be redundant. In the long run, if biotechnology can be used to eradicate suffering from the living world, then a shared celebration of life, not sympathy for the misfortunes of others, may come to seem as natural as breathing."