““Darwin’s theory of evolution, at least in its author’s eyes, dealt solely with the natural world. Yet it was as attractive to political theorists as a candle’s flame is to moths. Karl Marx asked if he could dedicate Das Kapital to Darwin, an honor the great naturalist declined.5 Darwin’s name was slapped on to Spencer’s political ideas, which would far more accurately have been called Social Spencerism. Darwin himself demolished them in a lapidary reproof. Yes, vaccination has saved millions whose weaker constitutions would otherwise have let them succumb to smallpox, Darwin wrote. And yes, the weak members of civilized societies propagate their kind, which, to judge from animal breeding, “must be highly injurious to the race of man.” But the aid we feel impelled to give to the helpless is part of our social instincts, Darwin said. “Nor could we check our sympathy, even at the urging of hard reason, without deterioration in the noblest part of our nature,” he wrote. “If we were intentionally to neglect the weak and helpless, it could only be for a contingent benefit, with an overwhelming present evil.” 6 Had Darwin’s””
