Good observation made in this article about Incan mummy sacrifice
It is very salient to point out that almost all primitive races have been killing their good-looking and intelligent people in human sacrifices for countless thousands of years. What you have left when you kill all your best people explains how they ended up looking like that.
This could be considered to have taken place during the Dark Ages under the Inquisition when women of unusual beauty, wit or naivete were singled out as likely to be witches. Between the the Catholic Church and Oliver Cromwell, monsters of various hues eliminated most of the good genes in Europe through selective extermination. When you look at British women today and wonder how they ended up looking like pack mules with wigs on, you have to remember how many unknown supermodels and extremely beautiful women died in bonfires at the stake at the hands of Inquisitors for the crime of being exceptional or noteworthy in some way. Their unique faces and charm were the exact reason they attracted attention to themselves. Would not be surprising if they rejected the advances of some local ecclesiastical pervert leading to the accusation of witchcraft, demonstrating they were probably more chaste and virtuous in addition to being beautiful.
The Darwinian notion of genes continuously "progressing" is a fantastic mythology like UFO abductions and Spiritual Seances. There is very little basis for it to be found in any race of people other than the Neanderthals. All the other races naturally were in continuous decline and did not "progress" anywhere. The only reason Homo Sapiens got a larger brain 38,000 years ago is by stealing it through gang rape of Neanderthals. The reality is that a hominid race that just manages to hold their ground genetically and not deteriorate is preserving a pretty unusual situation in an arrangement that is usually temporary at best.
When one sees the powerful tide that is entropy, it becomes apparent the melonheads themselves would not have been immune to these forces. Good King Tut desperately scoured about looking for a proper royal queen to marry but they were all long gone. Even had he found one, this narrow interbreeding for millennia had left them with a raft of genetic diseases and faults that led to their very downfall.
Anyone who fails to understand how difficult it is for genes to advance when bad genes can gang up and simply kill good genes will never understand natural selection amongst human beings. People who dismiss this curiosity in human affairs will never understand the many shortcomings of large scale social environments and the way they work against quality all the time. This is a very powerful, even paramount force in evolution as it applies to social bipeds. The only way to get around it is to pursue the strategies of Neanderthal peoples.
The truth is, 99% of everything is usually junk with humans no exceptions. Anything that is fine or well put together is always temporary and scheduled to give way to the dismal tide. This beautiful Incan would be replaced by people who survived her who often look like hemorrhoids with hats. Nobody would bother sacrificing them to the "gods" because it was obvious they were no prize. In this crazy dysgenic cycle, lack of facial summetry becomes a survival trait and stupidity is regarded as cunning.