As a member of the New England Historic Genealogical Society, I receive—among other benefits like admission to their fantastic library in Boston—their American Ancestors magazine. The Fall 2016 issue has an article by Bryan Sykes (author of The Seven Daughters of Eve and other books of genetic genealogy) entitled, "Deep Ancestry and the Golden Thread." The fascinating essay is actually about matrilineal genealogy, but it was the introduction that made me shake my head.
We all take the link for granted these days, but we few scientists working on the Y-chromosome in the mid-1990s...had dismissed any correlation between surnames and Y-chromosomes as highly unlikely. As geneticists, we were familiar with the high rate of non-paternity, which would have disrupted the surname/Y-chromosome association over time. [Upon investigation, however] the strength of the correlation was high enough to make it a useful tool for genealogists and showed, incidentally, that the historical rate of non-paternity in England was far lower, at around 1.3% per generation, than it is assumed to be today.
That was a surprise? Really? The mindset of the "sexual revolution" is now so entrenched and ingrained that intelligent, educated scientists are shocked to learn that most children in the past did know who their daddy was, and shared his name?
I must be missing something.