There is an interesting study going around about the genetics of people in Latin America. When the Europeans arrived there, and over the next several centuries, they killed the men and mated with the women. Generally.
"There is a clear genetic signature," explained lead author Andres Luiz-Linares from University College London.
"The initial mixing occurred predominately between immigrant and European men and native and African women."
He said that the study showed that it was a pattern that was uniform across Latin America.
"We see it in all the populations we examined, so it is clearly a historical fact that the ancestors of these populations can be traced to matings between immigrant men and native and African women."
The researchers found that within the genetic landscape of Latin America, there were variations.
"The Mestizo with the highest native ancestry are in areas which historically have had relatively large native populations," they reported.
This included Andean regions and cities such as Mexico City, where major civilisations were already established by the time Europeans reached the continent in the late 15th Century.
"By contrast, the Mestizo with the highest European ancestry are from areas with relatively low pre-Columbian native population density and where the current native population is sparse," they added.
Explaining the fate of native males when the Europeans arrived, Professor Luiz-Linares said: "It is a very sad and terrible historical fact, they were basically annihilated.
"Not only did the European settlers take away land and property, they also took away the women and, as much as possible, they exterminated the men."
He said the findings could help people change their perception of Latin American history.
This is not so much different than the patterns of tribes invading the British Isles early in the Christian era. Killing off the men and taking the women and the land seems to be, er, part of the territory.
We are brutal, we human beings. Ultimately we are driven by our genes, and our genes' desires to reproduce, and that has translated in the past to men with the cultural or military advantage using that advantage to reproduce. We see the male animals in nature shows killing off the offspring of other males. When we are better than that we show the better part of being human. But, on average, we don't.