Not to be too much of a pedant, but it might be worth re-examining the quote closer. >If this be the case, then it is certain that no perceptible evolutionary

Not to be too much of a pedant, but it might be worth re-examining the quote closer. >If this be the case, then it is certain that no perceptible evolutionary changes in human nature can possibly have taken place within the few thousands years of which we know or can conjecture the history. From my understanding, I believe Huxley is talking more about the ethical or moral characteristics of human nature. Greed, lust, selfishness, etc. rather than the physical makeup or allergies of humans.