However, it would seem to be rather dangerous to base any very positive hope on environment in the light of these charts, taken as a whole. There are too many other possible explanations of the anomaly, _e.g._ these cases may have been high-grade morons, who, to the untrained person, would seem so nearly normal, that at this late day it would be impossible to find any one who would remember their traits well enough to enable us to classify them as morons. We must not forget that, on Chart IX-e, we also have the daughter of Justin taken into a good family and carefully brought up, but in spite of all that, she proved to be feeble-minded. The same is probably true of Deborah’s half brother. We have claimed that criminality resulting from feeble-mindedness is mainly a matter of environment, yet it must be acknowledged that there are wide differences in temperament and that, while this one branch of the Kallikak family was mentally defective, there was no strong tendency in it towards that which our laws recognize as criminality. In other families there is, without doubt, a much greater tendency to crime, so that the lack of criminals in this particular case, far from detracting from our argument, really strengthens it. It must be recognized that there is much more liability of criminals resulting from mental defectiveness in certain families than in others, probably because of difference in the strength of some instincts. This difference in temperament is perhaps nowhere better brought out than in the grandparents of Deborah. The grandfather belonging to the Kallikak family had the temperament and characteristics of that family, which, while they did not lead him into positive criminality of high degree, nevertheless did make him a bad man of a positive type, a drunkard, a sex pervert, and all that goes to make up a bad character. On the other hand, his wife and her family were simply stupid, with none of the pronounced tendencies to evil that were shown in the Kallikak family. They were not vicious, nor given over to bad practices of any sort. But they were inefficient, without power to get on in the world, and they transmitted these qualities to their descendants.