Ovweall the Royal family has challenges the average family does not have and have evolved rather well. One challenge is occaisionally changing the entire bloodline. They do learn from their mistakes. After Henry the 8th there is slightly less mysogeny, After Richard the 3rd there is less serial nephew killing and after the abdication of a Nazi sypathizer Britain seems in good hands. Perhaps introducing new blood to the Royal family may one day result in dilluting the percentage of Neanderthal genes in the family. (Even today white people have far more Neandeerthal genes >3%, than black people <1%.)
Apologies to those who are offended by Neanderthal racism in these remarks. ;^/