Up until now, Darwin has been considered something of a hero on the political left, due to the religious right’s opposition to the teaching of evolution in schools (or at least, their insistence that one should “teach the controversy” that supposedly surrounds evolution and creationism). However, it is quite possible there will soon be a reckoning. For Darwin’s writings contain ample statements that would put him far beyond the pale of what is now considered acceptable.
First, differences between the sexes. In The Descent of Man, Darwin states that “the average of mental power in man must be above that of woman.” And in an 1882 letter, he states that “women though generally superior to men to moral qualities are inferior intellectually,” and that “there seems to me to be a great difficulty from the laws of inheritance… in their becoming the intellectual equals of man.” He also observes in The Descent of Man that “the male sex is more variable in structure than the female.” This observation has since become known as the greater male variability hypothesis, and has been applied to a variety of human traits including, most controversially, intelligence.
Second, differences between the races. Referring to some natives he encountered in South America during the voyage of the Beagle, Darwin observes, “one can hardly make oneself believe that they are fellow creatures.” He dedicates a whole chapter of The Descent of Man, to his study of “the races of man.” In that chapter he states, “There is, however, no doubt that the various races, when carefully compared and measured, differ much from each other… Their mental characteristics are likewise very distinct; chiefly as it would appear in their emotional, but partly in their intellectual faculties.” And in an earlier chapter of the book, he contrasts the “civilised races of man” with “the savage races,” noting that the former will “almost certainly exterminate, and replace” the latter.
Third, eugenics. In The Descent of Man, Darwin states, “We civilised men, on the other hand, do our utmost to check the process of elimination… Thus the weak members of civilised societies propagate their kind.” He then observes, “It is surprising how soon a want of care, or care wrongly directed, leads to the degeneration of a domestic race; but excepting in the case of man himself, hardly any one is so ignorant as to allow his worst animals to breed.” However, he also notes, “Nor could we check our sympathy, even at the urging of hard reason, without deterioration in the noblest part of our nature… We must therefore bear the undoubtedly bad effects of the weak surviving and propagating their kind.”
In summary, Darwin believed that men were on average more intelligent than women, and that some races were “civilised” whereas others were “savage.” His views on eugenics are not entirely clear (the term was coined one year after Darwin died), but it is obvious from his remarks in The Descent of Man that he believed industrial society could have dysgenic effects. Over the years, many scientists who have expressed views less invidious than these have been defenestrated, and one wonders whether Darwin will now suffer the same fate.
LRC note. We changed the title to a question as the OP provided no proof that Darwin was being banned from schools.